Triangles Challenge

Classify the triangle with angles 60°, 60°, 60°.

• Equilateral triangle

• Isosceles triangle

• Scalene triangle

• Right-angled triangle

Find the missing angle in a triangle with angles 45° and 85°.

• 100°

• 75°

• 30°

• 50°

A right-angled triangle has one angle of 30°. Find the measure of the other two angles.

• 60° and 90°

• 30° and 60°

• 90° and 90°

• 45° and 45°

Using the Pythagorean theorem, find the length of the hypotenuse in a right-angled triangle with sides 3 and 4.

• 5

• 2

• 10

• 7

Calculate the area of a triangle with base 6 and height 8.

• 24

• 10

• 14

• 30

Identify if the triangles with sides 3cm, 4cm, 5cm and 6cm, 8cm, 10cm are similar.

• No

• Maybe

• Yes

• Not sure

What type of triangle has angles measuring 30°, 60°, and 90°?

• Acute-angled triangle

• Right-angled triangle

• Isosceles triangle

• Equilateral triangle

In a triangle, if one angle is 110°, what are the measures of the other two angles?

• The measures of the other two angles could be any combination that adds up to 70°.

• The measures of the other two angles are 120° and 50°.

• The measures of the other two angles are 60° and 30°.

• The measures of the other two angles are 90° and 80°.

If the sides of a triangle measure 7cm, 24cm, and 25cm, is it a right-angled triangle?

• No

• Maybe

• Yes

• Not sure

Find the missing angle in a triangle with angles 55° and 75°.

• 30°

• 90°

• 100°

• 50°