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2. Find the number of sides of a regular polygon if each interior angle measures  

 

3The adjacent angles of a parallelogram are in the ratio 2:7. Find the angles 

 

4The perimeter of a parallelogram is 50cm. One side is  1½  times the other ,find the length of sides of the parallelogram. 

 

6How many diagonals are there in an octagon? 

 Oct 22, 2020
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2. Find the number of sides of a regular polygon if each interior angle measures 144 degrees.

360 / (180 - 144) = 10

 

3. The adjacent angles of a parallelogram are in the ratio 2:7. Find the angles.

180 / 9 = 20         angles are 40º and 140º 

 

4. The perimeter of a parallelogram is 50cm. One side is  1½  times the other, find the length of sides of the parallelogram.

the length of a side is 15cm 

 Oct 23, 2020

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