Angles
Properties of Triangles
Supplementary & Complementary
100

What do you call an angle that measures less than 90 degrees?

Acute angle

100

How many sides does a triangle have?

3

100

What do you call two angles that add up to 90 degrees?

Complementary angles

200

What type of angle measures exactly 90 degrees?

Right angle

200

What is the sum of the interior angles of a triangle?

180 degrees

200

 If one angle measures 70 degrees, what is the measure of its supplementary angle?

110 degrees

300

What do we call angles that sum up to 180 degrees?

Supplementary angles

300

Name the triangle with all three sides of different lengths.

Scalene triangle

300

 If two angles are complementary and one measures 30 degrees, what is the measure of the other angle?

60 degrees

400

 Identify the angle that measures more than 90 degrees but less than 180 degrees.

Obtuse angle

400

 What do we call a triangle with one angle measuring more than 90 degrees?

Obtuse triangle

400

What are two angles called if they are supplementary?

They add up to 180 degrees

500

What is the term for angles that are across from each other when two lines intersect?

Vertical angles

500

What is the term for a triangle with two equal sides?

Isosceles triangle

500

 If angle A is 45 degrees, what is the measure of angle B if they are complementary?

45 degrees