Question

How to do it.How to find the area.How to find the perimeter

Answer 1

That's an isosceles triangle

To find the perimeter you have to do Base+2Side so 17+2*15 = 17+30 = 47 mm

To find the area you have to do (Base*Height)/2 = 17*7/2 = 119/2 = 59,5 mm²

Answer 2

Perimeter: Add all the sides together
Area: Multiply half the base times the height