Question

Please can you answer this it is probably easy but I am confused ​

Answer 1

An exterior angle is equal to the sum of two opposite interior angles. I hope this helps

Answer 2

to find 1 exterior angle, the formula is :
360 / no. of sides

no. of sides a decagon has = 10

so, 360 / 10
= 36

1 exterior angle would be 36 degrees