find the area of polygons
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AIM :-
To find the area of the figure
Given :-
- AB = 11cm
- AE = 60cm
- CD = 26cm
- Distance between CD and EB = 18cm
In ∆ABE :-
AB = 11cm
AE = 60cm
∠A = 90°
By using Pythagoras theorem,
(Base)² + (Height)² = (Hypotenuse)²
(AB)² + (AE)² = (EB)²
(11)² + (60)² = (EB)²
121 + 3600 = (EB)²
3721 = (EB)²
√3721 = EB
61cm = EB
Area of figure :- Area of BCDE + Area of ∆ABE
Area of ∆ABE :-
Substituting the values,
By cancelling 2 in the denominator and 60 in the numerator,
Area of trapezium BCDE :-
Substituting the values,
2 in the denominator and 18 in the numerator gets cancelled
Total area of the figure :- 330 + 783 = 1113cm²
Some more formulas :-
Area of square = (side)²
Area of parallelogram = base × height
Area of rectangle = length × breadth
Area of rhombus = ½ × Diagonal 1 × Diagonal 2
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