Question

Anybody help me with this math problem. (pleaaseee) ​

Answer 1

Answer:

20 sq cm

Explanation:

given :

A1 + A2 = 10 sq.cm

but...

A1 = 1/2 × L × B1 ; in ∆1 base L & height B1

A2 =1/2 × L× B2 ; in ∆2 base L & height B2

now....

A1 + A2 =( 1/2 × L × B1 ) + ( 1/2 × L × B2) =10

1/2 × L × ( B1 + B2 ) = 10

but again....

B1 + B2 = B ; breadth of rectangle

therefore...

1/2 × L × B = 10

means...

1/2 × ( L × B ) = 10

1/2 × A = 10. ; A = area of rectangle

hence....

A = 10 × 2 = 20 sq cm

Answer 2

Answer:

The triangle and rectangle have same base between two parallel lines then the area of triangle is half of rectangle. Therefore sum of areas triangles =1/2(sum of areas of two rectangles)

10=1/2(total rectangle)

Area of rectangle =20 cm ^2