The area of a triangle is 150 cm2 and its sides are in the ratio 3 : 4 : 5. what is its perimeter?

Full Marks Mathematics 9>Heron's Formula>TEST YOUR SKILLS>Q 20

1. Area of Triangles:

(i) Area of a triangle when its base and height are known is calculated by using the formula: Area of triangle =12×Base×Height

(ii) If b denote the base and p the perpendicular of a right triangle, then the area of the triangle =12bp

(iii) For an isosceles right-angled triangle, each of whose equal side is a, we have the area =a22

(iv) For an equilateral triangle, each of whose side is a, we have the area =34a2

2. Heron's Formula:

If a, b, c denote the lengths of the sides of a triangle, then area =ss-as-bs-c, where s=a+b+c2

3. The area of a quadrilateral can be calculated by dividing the quadrilateral into triangles and using Heron's formula for calculating area of each triangle.

The area of a triangle is 150 cm2 and its sides are in the ratio 3 : 4 : 5. what is its perimeter?

Did you know that the area of a quadrilateral can be calculated by dividing the quadrilateral into two triangles and using Heron's formula? Let's watch this...

Do you know how to calculate the area of a triangle when all three side lengths are given? It is very easy. Watch this video to understand how to calculate.

It is easy to find out the area of a triangle when we know its height and base. This video helps us understand the area of a triangle with examples. Let's wa...

We all love to go for a sail, but there are certain questions that we have never asked. Click and find out the application of Heron's formula in regards to a...

Can you determine the area of the sail of a boat? The conventional way to find sail area is to calculate the area of the fire triangle between the masthead s...