12. A parallelogram has sides 15 cm and 7 em long. The length of one o

1.	12. A parallelogram has sides 15 cm and 7 em long. The length of one of the dliao20 em. What is the area of the parallelogram?
Answer» Here, a = 15 cm b = 7 cm c = 20 cm s = a+b+c/2 = 15+7+20/2 = 42/2 = 21 cm Area = 2√(s(s-a)(s-b)(s-c)) = 2√(21(21-15)(21-7)(21-20)( = 2√(216141) = 273*2 = 84 cm² Like my answer if you find it useful!

12. A parallelogram has sides 15 cm and 7 em long. The length of one of the dliao20 em. What is the area of the parallelogram?

Answer»

Here,

a = 15 cm

b = 7 cm

c = 20 cm

s = a+b+c/2

= 15+7+20/2

= 42/2

= 21 cm

Area = 2√(s(s-a)(s-b)(s-c))

= 2√(21*(21-15)*(21-7)*(21-20)(

= 2√(21*6*14*1)

= 2*7*3*2

= 84 cm²

Like my answer if you find it useful!