Question

An advertisement board is in the form of an isosceles triangle with perimeter 36m and each of the equal sides are 13m . find the cost of the painting it at $17.50 per square meter​

Answer 1

Answer:$1050

Step-by-step explanation:

Pythagoras theorem: 13^2=((36-13-13)/2)^2+x^2 Where x is height

169=25+x^2

x^2=144

x=12

12*10/2*$17.50=$1050