Triangles
The sum of all angles in a triangle equals this number.
What is 180°?
The distance from the center of a circle to any point on the circle.
What is the radius?
Two angles that add up to 90°
What are complementary angles?
A triangle has angles measuring 50° and 70°. Find the third angle.
What is 60°?
A circle has a radius of 4 cm. What is its diameter?
What is 8 cm?
Two angles that add up to 180°
What are supplementary angles?
Name the type of triangle that has all three sides of equal length.
What is equilateral?
Find the circumference of a circle with a radius of 3 inches. (Use π ≈ 3.14)
What is 18.84 inches?
Two lines intersect. One angle measures 65°. What is the measure of the vertical angle?
What is 65°?
Can you form a triangle with sides of 5 cm, 6 cm, and 12 cm? Why or why not?
What is no, because 5 + 6 = 11, which is not greater than 12?
A circle has a diameter of 10 meters. Find its area. (Use π ≈ 3.14)
What is 78.5 square meters?
An angle measures 42°. What is the measure of its complementary angle?
What is 48°?
A right triangle has one angle of 35°. What is the measure of the third angle?
What is 55°?
The circumference of a circle is 31.4 cm. What is the radius? (Use π ≈ 3.14)
What is 5 cm?
An angle measures 115°. What is the measure of its supplementary angle?
What is 65°?