GEOMETRY Alex Armenta by Alex Armenta

GEOMETRY Alex Armenta

Published on Dec 09, 2015

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GEOMETRY Alex Armenta

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ACUTE ANGLE An Acute Angle is less than 90° This is an acute angle.

OBTUSE ANGLEObtuse Different Angles have different names: types of angle. An Obtuse Angle is more than 90° but less than 180°. Obtuse Angle This is an obtuse ...

RIGHT ANGLEIn geometry and trigonometry, a right angle is an angle that bisects the angle formed by two halves of a straight line. More precisely, if a ray is placed so that its endpoint is on a line and the adjacent angles are equal, then they are right angles.

Straight angle This A straight angle changes the direction to point the opposite way. Sometimes people say "You did a complete 180 on that!

Vertical angleVertical Angles are the angles opposite each other when two lines cross. " Vertical" in this case means they share the same Vertex (corner point), not the usual ...

Adjacent angleWhat Is and Isn't an Adjacent Angle. These ARE Adjacent Angles. they share a vertex and a side. NOT Adjacent Angles. they only share a vertex, not a side.

Complementary anglesThese two angles (40° and 50°) are. Complementary Angles, because they add up to 90°. Notice that together they make a right angle right angle . But the ...

Supplementary angles Two Angles are Supplementary if they add up to 180 degrees. These two angles (140° and 40°) are Supplementary Angles, because they add up to 180°.

Corresponding angles When two lines are crossed by another line (called the Transversal): The angles in matching corners are called Corresponding Angles.

Transversal a line that crosses at least two other lines. The red line is the transversal in each example

Acute angleAn Acute Angle is less than 90° This is an acute angle. All the angles below are acute

Obtuse angle An Obtuse Angle is more than 90° but less than 180°. Obtuse Angle This is an obtuse

Right angle A right angle is an internal angle which is equal to 90°. This is a right angle. Note the special symbol like a box in the angle. If we see this, it is a

Straight angleThis is a straight angle. A straight angle changes the direction to point the opposite way. Sometimes people say "You did a complete 180 on that!

Acute triangleAcute Triangle. more ... Acute triangle that has all angles less than 90 ° (90° is a Right Angle). See: Obtuse Triangle ...

Right triangle A right triangle (American English) or right-angled triangle (British English) is a triangle in which one angle is a right angle (that is, a 90-degree angle). The relation between the sides and angles of a right triangle is the basis for trigonometry

Obtuse triangle A triangle that has an angle greater than 90°. See: Acute Triangle · Triangles - Equilateral, Isosceles and Scalene.

Scalene triangle A scalene triangle is a triangle that has three unequal sides, such as those illustrated above. SEE ALSO: Acute Triangle, Equilateral Triangle, Isosceles Triangle.

Isosceles triangle This property is equivalent to two angles of the triangle being equal. An isosceles triangle therefore has both two equal sides and two equal angles. The name

Equilateral triangle In geometry, an equilateral triangle is a triangle in which all three sides are equal. In traditional or Euclidean geometry, equilateral triangles are also equiangular; that is, all three internal angles are also congruent to each other and are each 60°.

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ACUTE ANGLE
An Acute Angle is less than 90° This is an acute angle.

OBTUSE ANGLE
Obtuse Different Angles have different names: types of angle. An Obtuse Angle is more than 90° but less than 180°. Obtuse Angle This is an obtuse ...

RIGHT ANGLE
In geometry and trigonometry, a right angle is an angle that bisects the angle formed by two halves of a straight line. More precisely, if a ray is placed so that its endpoint is on a line and the adjacent angles are equal, then they are right angles.

Straight angle
This A straight angle changes the direction to point the opposite way. Sometimes people say "You did a complete 180 on that!

Vertical angle
Vertical Angles are the angles opposite each other when two lines cross. " Vertical" in this case means they share the same Vertex (corner point), not the usual ...

Adjacent angle
What Is and Isn't an Adjacent Angle. These ARE Adjacent Angles. they share a vertex and a side. NOT Adjacent Angles. they only share a vertex, not a side.

Complementary angles
These two angles (40° and 50°) are. Complementary Angles, because they add up to 90°. Notice that together they make a right angle right angle . But the ...

Supplementary angles
Two Angles are Supplementary if they add up to 180 degrees. These two angles (140° and 40°) are Supplementary Angles, because they add up to 180°.

Corresponding angles
When two lines are crossed by another line (called the Transversal): The angles in matching corners are called Corresponding Angles.

Transversal
a line that crosses at least two other lines. The red line is the transversal in each example

Acute angle
An Acute Angle is less than 90° This is an acute angle. All the angles below are acute

Obtuse angle
An Obtuse Angle is more than 90° but less than 180°. Obtuse Angle This is an obtuse

Right angle
A right angle is an internal angle which is equal to 90°. This is a right angle. Note the special symbol like a box in the angle. If we see this, it is a

Straight angle
This is a straight angle. A straight angle changes the direction to point the opposite way. Sometimes people say "You did a complete 180 on that!

Acute triangle
Acute Triangle. more ... Acute triangle that has all angles less than 90 ° (90° is a Right Angle). See: Obtuse Triangle ...

Right triangle
A right triangle (American English) or right-angled triangle (British English) is a triangle in which one angle is a right angle (that is, a 90-degree angle). The relation between the sides and angles of a right triangle is the basis for trigonometry

Obtuse triangle
A triangle that has an angle greater than 90°. See: Acute Triangle · Triangles - Equilateral, Isosceles and Scalene.

Scalene triangle
A scalene triangle is a triangle that has three unequal sides, such as those illustrated above. SEE ALSO: Acute Triangle, Equilateral Triangle, Isosceles Triangle.

Isosceles triangle
This property is equivalent to two angles of the triangle being equal. An isosceles triangle therefore has both two equal sides and two equal angles. The name

Equilateral triangle
In geometry, an equilateral triangle is a triangle in which all three sides are equal. In traditional or Euclidean geometry, equilateral triangles are also equiangular; that is, all three internal angles are also congruent to each other and are each 60°.