An umbrella is made by stitching 10 triangular pieces of cloth each measuring 60 cm ,60cm , and 20 cm, find the area of cloth required for umberella
Answers
Answer:
Step-by-step explanation: dimensions of triangular piece of cloth=60,60,20
area of this triangle = we are going to find the area using herons formula
so using herons formula = a+b+c/2 = 60+60+20/2 = 70=s(semiperimeter)
area= √s(s-a)(s-b)(s-c) = √70(70-60)(70-60)(70-20)
√70×10×10×50 = √350×100 = 10√350 = 10×18.7 (√350=18.7 approx)
10×18.7=187=area of 1 triangle
area of clothe required = area of 10 triangles = 187×10 = 1870
hope it helps
plz mark me brainliest
Answer:
1870
Step-by-step explanation:
Step-by-step explanation: dimensions of triangular piece of cloth=60,60,20
area of this triangle = we are going to find the area using herons formula
so using herons formula
s = a+b+c/2
s= 60+60+20/2 = 70=s(semiperimeter)
area= √s(s-a)(s-b)(s-c)
√70(70-60)(70-60)(70-20)
√70×10×10×50
√350×100
10√350 = 10×18.7
(√350=18.7 approx)
10×18.7=187=area of 1 triangle
area of clothe required = area of 10 triangles = 187×10 = 1870
hope it helps
plz mark me brainliest