Question

Find the area of a triangle whose sides are 6.5 cm. 7 cm and 7.5 cm​

Answer 1

Step-by-step explanation:

solve:.a=6.5cm,b=7cm,c=7.5cm

s=a+b+c/2

=6.5+7+7.5

=21/2

=10.5

A=

$a = \sqrt{s(s - a)(s - b)(s - c)} \\ \sqrt{10.5(10.5 - 6.5)(10.5 - 7)(10.5 - 7.5)} \\ \sqrt{10.5 \times 4 \times 3.5 \times 3} \\ \sqrt{ \frac{105}{10} } \times 4 \times \frac{35}{10} \times 3 \\ \sqrt{ \frac{3 \times 5 \times 7 \times 2 \times 2 \times 5 \times 7 \times 3}{2 \times 5 \times 2 \times 5} } \\ \frac{3 \times 5 \times 7 \times 2}{2 \times 5} \\ \frac{210}{10} \\ 21 \: is \: the \: correct \: answer \\ i \: hope \: it \: will \:help \: you \: mark \: me$