Question

For the given, □^mMNOP which of the following option is incorrect?

• A. ∠ M = 80^o
• B. M + O = 160^o
• C. N = 100^o
• D. O + N = 160^o

Answer 1

The correct option is A

∠ M = 80^o

Opposite angles are equal in parallelograms, so ∠N = ∠ P = 100o. Also, adjacent angles are supplementary, so ∠P + ∠M=180o => ∠M=80o. ∠M and ∠O are opposite angles and hence are equal. So ∠O = 80o => ∠M + ∠O=160o. ∠N and ∠O are adjacent angles and should therefore be supplementary. So their sum should be 180^o and not 160^o.