Question

(b) Area of a triangle whose base is 3 cm and height is 7 cm is-
(i) 10.5 cm²
(ii) 21 cm²

(iii) 10.5 cm
(iv) 105 cm²
Plz Give me the Full Solution...​

Answer 1

Given :

• Base of triangle = 3 cm
• Height of triangle = 7 cm

To find :

• Area of triangle

According to the question,

→ Area of triangle = ½ × base × height

→ Area of triangle = ½ × 3 cm × 7 cm

→ Area of triangle = 1.5 cm × 7 cm

→ Area of triangle = 10.5 cm²

So,the area of triangle is 10.5 cm².

The correct option is (i) 10.5 cm².

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More formulas :-

• Area of rectangle = Length × Breadth

• Area of square = Side × Side

• Perimeter of rectangle = 2(length + breadth)

• Perimeter of triangle = Sum of all its side

• Perimeter of square = 4 × side

• Perimeter of circle = 2πr

Answer 2

Answer:

Given :-

• A triangle whose base is 3 cm and height is 7 cm.

To Find :-

• What is the area of the triangle.

Formula Used :-

$\boxed{\bold{\small{Area\: of\: triangle\: =\: \dfrac{1}{2} ×\: base\: ×\: height}}}$

Solution :-

Given :

• Base = 3 cm
• Height = 7 cm

According to the question by using the formula we get,

⇒ Area = $\dfrac{1}{2}$ × 3 × 7

⇒ Area = $\dfrac{1}{2}$ × 21

➠ Area = 10.5 cm²

$\therefore$ The area of the triangle is 10.5 cm² .

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