Triangle Angle and Classification Quiz

Front

What is the missing angle in a triangle with angles of 65° and 50°?

Back

65° + 50° + x = 180°; x = 65°.

Front

A triangle has angles of 90°, 45°, and ___. What is the third angle?

Back

The third angle is 45°.

Front

A triangle has one angle that measures 30° and another that measures 60°. What type of triangle is it based on its angles?

Back

It is an acute triangle.

Front

Classify the triangle with side lengths of 5 cm, 5 cm, and 8 cm by its sides.

Back

It is an isosceles triangle.

Front

A triangle has all three angles less than 90°. What kind of triangle is it based on its angles?

Back

It is an acute triangle.

Front

Classify the triangle with angles 40°, 60°, and 80°.

Back

It is an acute triangle.

Front

Can a triangle have sides measuring 3 cm, 4 cm, and 8 cm? Why or why not?

Back

No, because 3 + 4 is not greater than 8.

Front

Is it possible to have a triangle with angles 90°, 60°, and 40°? Explain.

Back

Yes, because the angles add up to 180°.

Front

Can a triangle have two right angles? Why or why not?

Back

No, because the angles would add up to more than 180°.

Front

A triangle has two equal angles of 70°. What is the measure of the third angle, and what type of triangle is it?

Back

The third angle is 40°; it is an isosceles triangle.