UNIT 4 VOCABULARY TERMS

ACUTE TRIANGLE

• An acute triangle is a triangle that has three acute angles.

RIGHT TRIANGLE

• A triangle that contains one right angle.

OBTUSE TRIANGLE

• A triangle with one obtuse angle.
• A real world example is the sides of an easel or a ladder.

EQUIANGULAR TRIANGLE

• A triangle whose sides are all congruent.
• A real life example would be the pyramids.

EQUILATERAL TRIANGLE

• A triangle whose sides are all congruent.
• A real life example is a triangular traffic sign.

ISOSCELES TRIANGLE

• Triangle that has at least 2 congruent sides.
• A real life example would be a hanger.

SCALENE TRIANGLE

• A triangle with no congruent sides.
• Real life example is the sail of a sailboat.

SSS

• Three sides of a triangle that are congruent.

SAS

• A triangle contains a congruent angle between congruent sides

ASA

• Two congruent angles with a congruent side between them.

AAS

• Two congruent angles on opposite sides.

CPCTC

• Corresponding parts of congruent triangles are congruent.

CONCURRENT

• When three or more lines meet at one point.

MEDIAN OF A TRIANGLE

• A line segment from the vertex to the midpoint of an opposite side.

CENTROID

• The point where three medians meet.

ALTITUDE OF A TRIANGLE

• A line segment connecting a vertex to the line containing the opposite side and perpendicular to that side.