Angles in quadrilaterals | Starter Quiz | Oak National Academy

Which of the angles shown is an obtuse angle?

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Answer explanation

Angle A is an obtuse angle. It is greater than a right angle but less than a straight line. Angle C is a right angle.

What is the missing value in this bar model? (a)   °

Answer explanation

The missing value is 181° because the sum is 360° and 360° = 129° + 50° + 181°

What is the missing value in this bar model? (a)   °

Answer explanation

The missing value is 164° because the sum is 360° and 360° = 164°

Complete the sentence. (a)   ° is needed to complete the angles about a point.

Answer explanation

133° is needed to complete the angles about a point. Angles about a point sum to 360° so 360° − 118° − 109° = 133°

This is a quadrilateral. Look carefully at the vertices and the angles inside the shape. Which statement is correct?

• The quadrilateral has four acute angles.

• The quadrilateral has four obtuse angles.

• The quadrilateral has two acute angles and two obtuse angles.

• The quadrilateral has two right angles and two acute angles.

Answer explanation

The quadrilateral has two acute angles and two obtuse angles.

This is a quadrilateral. Look carefully at the vertices and the angles inside the shape. Which statement is correct?

• The quadrilateral has four acute angles.

• The quadrilateral has two acute angles and two obtuse angles.

• The quadrilateral has three acute angles and one reflex angle.

• The quadrilateral has two acute angles, one obtuse angle and one reflex angle.

Answer explanation

The quadrilateral has two acute angles, one obtuse angle and one reflex angle.