the diagram shows a triangle.all the measurements are in cmthe perimeter of the triangle is 70cm the area of the triangle is Acm squaredwork out the value of A
Accepted Solution
A:
Answer:A = 110.25Step-by-step explanation:add all the equations and equal it to 180 because all triangle angles add to 180:4x+1 + 3x + 3x-1 = 18010x =70/10 /10x = 7Insert x into each equation and solve:3(7)-1 = 204(7)-1 = 273(7) = 21and then use A = 1/2 base*height formula:A= 1/2 21* 20A= 210