Triangles

What type of triangle has two equal sides and one unequal side?

• right angle

• isosceles

• equilateral

• scalene

What do you call a triangle that has no equal sides?

• right angle

• isosceles

• equilateral

• scalene

What is the perimeter of an equilateral triangle that has sides 15 cm long?

• 225 cm

• 30 cm

• 45 cm

• 150 cm

In an equilateral triangle, all of the angles measure __ degrees.

• 60 degrees

• 45 degrees

• 90 degrees

• 80 degrees

The perimeter of a scalene triangle is 30cm. If two of the sides measure 8cm and 10 cm, what is the length of the third side?

• 10 cm

• 18 cm

• 15 cm

• 12 cm

What is the area of the triangle shown?

• 42 sq cm

• 35 sq cm

• 21 sq cm

• 13 sq cm

What is the perimeter of the triangle shown?

• 23

• 37

• 27

• 32

In a right-angled triangle, the two other angles are even. What size are they?

• 60 degrees

• 45 degrees

• 90 degrees

• 80 degrees

In the isosceles triangle shown, the perimeter is 79 cm, what the length of side x?

• 44 cm

• 35 cm

• 22 cm

• 30 cm

Calculate the area of a triangle that has a base of 12cm and a height of 8cm.

• 84 sq cm

• 42 sq cm

• 96 sq cm

• 48 sq cm