Geometry Mastery Challenge

Isosceles triangle

Equilateral triangle

Right triangle

Scalene triangle

Triangle Inequality Theorem

Angle-Angle (AA) Similarity Theorem

Pythagorean Theorem

Side-Angle-Side (SAS) Theorem

360 degrees

180 degrees

90 degrees

120 degrees

At least two sides are equal in length.

All sides are equal in length.

It has exactly one right angle.

The angles are all 90 degrees.

The angles opposite the equal sides are different.

The angles opposite the equal sides are both 90 degrees.

The angles opposite the equal sides are equal.

The angles opposite the equal sides are complementary.

To determine the angles in obtuse triangles.

To calculate the circumference of circles.

To calculate the lengths of sides in right triangles.

To find the area of any triangle.

5

6

7

8

Triangle DEF'

Triangle XYZ

Triangle ABC

Triangle DEF

The corresponding angles of similar triangles are supplementary.

The corresponding angles of similar triangles are complementary.

The corresponding angles of similar triangles are equal.

The corresponding angles of similar triangles are always obtuse.

The triangles can have different shapes but the same area.

Their corresponding sides are equal in length and their corresponding angles are equal in measure.

One triangle can be larger than the other while still being congruent.

Their corresponding sides are unequal in length and their corresponding angles are unequal in measure.