Math for 7th grade homework. a total of three problems attached

Step-by-step explanation:

The area of the first rectangle is 6cm x 3 cm = 18cm.

Area of circle : Pi x r^2

3.14 x 1.5 x 1.5 = 7.065

2 circles : 7.065 x 2 = 14.13

Shaded region : 18 - 14.13 = 3.87

Hope this helps!

the sum of the lengths of any two sides of a triangle is greater than the length of the third side. if you take the three sides of a triangle and add them in pairs, the sum is greater than (not equal to) the third side. if that is not true, then it is not possible to construct a triangle with the given side lengths.

step-by-step explanation: