Angle A is greater than the right angle by 20.5 °, and angle B is less than angle A by 20 °.

Angle A is greater than the right angle by 20.5 °, and angle B is less than angle A by 20 °. What kind of angle B – straight, obtuse or acute?

We find the value of the angle A, for this it is necessary to add 20.5 ° to the value of the right angle (90 °):

90 ° + 20.5 ° = 110.5 ° – the value of this angle A;

Let’s find the value of the angle B, for this it is necessary to subtract 20 ° from the value of the angle A:

110.5 ° – 20 ° = 90.5 ° is the value of this angle B.

therefore, angle B can be said to be obtuse, since its value is greater than 90 °.

Answer: Angle B is an obtuse angle.