Question

What is the area of the obtuse triangle given below

Answer 1

Answer: D. 9 sq. units.

Explanation:

We know that , the area of a triangle =
`(1)/(2)* \text{Base x height}}`

In the given picture , it can be seen that the height of the triangle = 2 units

and base length of triangle = 9 units

Then, the area of a triangle =
`(1)/(2)*9*2`

i.e. Area of a triangle = 9 square units.

Hence, the correct answer is option D. 9 sq. units.

Answer 2

Option D 9 sq units

Explanation:

we know that

The area of a triangle is equal to

`A=(1)/(2)(b)(h)`

where

b is the base

h is the height

In this problem we have

`b=9\ units\\h=2\ units`

substitute in the formula

`A=(1)/(2)(9)(2)`

`A=9\ units^2`