Question

in an isosceles triangle the angle between the equal side is known as​

Answer 1

Answer: in an isosceles triangle the angle between the equal side is known as the legs

Answer 2

Answer:

In an isosceles triangle, its two equal sides are 20 cm each and the angle between them is 45 degrees. What is the area of the triangle?

9 Answers



Kumar Saurav, Math geek.

Answered May 18, 2017 · Author has 486 answersand 1M answer views



Consider any triangle ΔABC.ΔABC.

In right triangle ΔABD,ΔABD,

sinθ=BDABsin⁡θ=BDAB

BD=ABsinθBD=ABsin⁡θ

The area of this triangle is easy right?

ar(ΔABC)=12BD⋅ACar⁡(ΔABC)=12BD⋅AC

ar(ΔABC)=12AB⋅ACsinθar⁡(ΔABC)=12AB⋅ACsin⁡θ