Question

the base of an isoceles at triangle is 30cm its area is​

Answer 1

Answer:

Given that △ABC is an isosceles right triangle.

Since the base BC=30 cm, therefore, AB=30 cm.

Area of △ABC:

A=

2

1

×AB×BC=

2

1

×30×30=450 cm

2

Hence, area of △ABC is 450 cm

2

.

Answer 2

answer:

base : 30 cm

area of a triangle :- √s(s-a)(s-b)(s-)

let the 2 other sides be 'x' (as they are both equal let's name it as 'x')

s:- a+b+c/2

so, let a :- x

b :- x

c :- 30 cm

s:- a+b+c / 2

:- x + x + 30 / 2

:- 2x +30 / 2

so, let's take 2 as common and,

:- 2(x+15) / 2

so, let's cancel that 2

:- x+15

so, we'll be left with x+15

area:-√x+15(x+15-x)(x+15-x)(x+15-30)

:-√(x+15)(15)(15)(x-15)

:-15√(x+15)(x-15)

:-15√(x+15)×√(x-15)

:-15 + (x² - 225)

:-15 - 225 + x²

:- -210 + x²

Here's ur answer

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