1. If LMNO is a parallelogram, and LM=2y-9 and NO=y-2, find the value of 'y'.

Question

Does y=7?

2. RSTV is a parallelogram. RT and SV intersect at Q. RQ=5x+1 and QT=3x+15. Find OT.
Does QT=7?

3. RATS is a parallelogram. If angle s= (8x) and angle t=(7x) then find the value of 'x'.
Does x=12?

4. In triangleABC, AB=3, BC=4 and AC=6. Name the largest angle.
Is the largest angle B?

5. Find the sum of the interior angles of a decagon.
Is the sum 144?

Answer 1

#1 ok
#2 ok
#3 ok
#4 ok
#5 8(180) = 1440
each angle is 144, not the sum.