Practice Quiz

Which of the following is true about an equilateral triangle?

• All angles are 60° and all sides are equal

• One angle is 90° and sides are unequal

• Two sides are equal and one is longer

• It has one obtuse angle

What is the least common multiple (LCM) of 6 and 8?

• 12

• 24

• 18

• 48

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

• 90°

• 180°

• 270°

• 360°

Which type of triangle has all sides of different lengths?

• Equilateral

• Right-angled

• Isosceles

• Scalene

A triangle with two equal sides is known as:

• Isosceles

• Scalene

• Equilateral

• Obtuse

What type of triangle has one angle greater than 90°?

• Isosceles

• Acute

• Right-angled

• Obtuse

Which of the following statements is true about a scalene triangle?

• All sides are equal

• Two sides are equal

• It has one right angle

• All sides are of different lengths

In an isosceles triangle, the angles opposite the equal sides are:

• Equal to each other

• 90°

• Always obtuse

• Acute but unequal

Which type of triangle has three angles that are all equal and acute?

• Right-angled triangle

• Equilateral triangle

• Scalene triangle

• Isosceles triangle

Which of the following describes a triangle with angles 90°, 45°, and 45°?

• Scalene triangle

• Equilateral triangle

• Right-angled isosceles triangle

• Acute triangle