Question

3.If the sides that form the right angle of a triangle are 3.5 cm and 4.2 cm long, find the area of the triangle.​

Answer 1

Given :- The sides that form the right angle of a triangle are 3.5 cm and 4.2 cm long.

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To find :- The area of the triangle.

Solution :-

We know that,

→ Area of triangle = 1/2 * b * h.

We have values,

• b = 3.5cm.
• h = 4.2cm.

putting all values we get,

→ Area of triangle = 1/2 * 3.5 * 4.2

→ Area of triangle = 1 * 3.5 * 2.1

→ Area of triangle = 3.5 * 2.1

→ Area of triangle = 7.35 (Ans.)

Hence, the area of the right angle triangle is 7.35cm².

Some related formulas :-

• Area of traingle = 1/2 * b * h.
• Perimeter of traingle = Sum of all sides.
• Area of Rectangle = length * breadth.
• Perimeter of Rectangle = 2 (l+b).
• Diagonal of Rectangle = √(l)² + (b)².
• Area of Sqaure = Side * Side.
• Perimeter of Square = 4 * Side.
• Diagonal of Square = √2a.

Answer 2

Given :

✰ Base of traingle (B) = 3.5cm

✰ Height of traingle (H) = 4.2cm

To Find :

✰ Area of Traingle

Solution :

✰ As in the Question Sides of right traingle are given, where Base is 3.5cm and height is 4.2 cm. By using The formula of area of triangle 1/2 × Base × Height. By Putting the values in the formula we can easily find the area of triangle

Area of Traingle = 1/2 × B × H

Where,

• Base (B) = 3.5cm

• Height (H) = 4.2cm

→ Area = 1/2 × 3.5 × 4.2

→ Area = 1/2 × 14.75

→ Area = 7.35cm²

∴ Area of Traingle is 7.35cm²