Angles and Triangles

Front

What are vertical angles?

Back

Vertical angles are angles that are opposite each other when two lines intersect. They are always congruent (equal in measure).

Front

What is the value of x if the angles are complementary and one angle is 62°?

Back

x = 28° (since complementary angles add up to 90°).

Front

What type of triangle has one angle greater than 90° and no equal sides?

Back

Obtuse Scalene triangle.

Front

If the angles of a triangle are 30°, 60°, and x°, what is the value of x?

Back

x = 90° (since the sum of angles in a triangle is 180°).

Front

What type of triangle has all angles less than 90° and two equal sides?

Back

Acute Isosceles triangle.

Front

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

Back

The sum of the interior angles of a triangle is always 180°.

Front

What do you call a triangle with all sides of different lengths?

Back

Scalene triangle.

Front

What is an acute angle?

Back

An acute angle is an angle that measures less than 90°.

Front

What is an obtuse angle?

Back

An obtuse angle is an angle that measures more than 90° but less than 180°.

Front

If two angles are supplementary and one angle is 110°, what is the other angle?

Back

The other angle is 70° (since supplementary angles add up to 180°).