Question

Area of triangle with formula

Answer 1

Answer:

area of triangle:-1/2 base×height.

{s(s-a×s-b×s-c)}

Answer 2

• Area of a Triangle = A = ½ (b × h) square units

• Area of an Equilateral Triangle = A = (√3)/4 × side2

Now, if any two sides and the angle between them are given, then the formulas to calculate the area of a triangle is given by:

Area (∆ABC) = ½ bc sin A

Area (∆ABC) = ½ ab sin C

Area (∆ABC) = ½ ca sin B

These formulas are very easy to remember and also to calculate.

For example, If, in ∆ABC, A = 30° and b = 2, c = 4 in units. Then the area will be;

Area (∆ABC) = ½ bc sin A

= ½ (2) (4) sin 30

= 4 x ½ (since sin 30 = ½)

= 2 sq.unit.