Question

State the values below

Answer 1

i) 20°

ii) 25°

iii) 30°

iv) 75°

∡AOB and ∡COD are already given.

To find ∡BOC, we must subtract all the other angles from 90 because the combined total of all the angles is a right angle.

`90-15-25-20=30`

∡BOC is 30°.

Now that we know ∡BOC, we can add it up with ∡AOB and ∡COD to form the final angle of ∡AOD.

`20+30+25=75`

∡AOD is 75°