Advertisements
Advertisements
Question
Find the area of the shaded portion in the following figure.
Advertisements
Solution
Area of shaded region = Area of the circle – Area of four triangles – Area of a square
Area of four triangles = `4 xx 1/2 xx "Base" xx "Height"`
= `4 xx 1/2 xx 7 xx 7`
= `(4 xx 49)/2`
= 2 × 49
= 98 cm2
Area of a square = (Side)2
= (7)2
= 49 cm2
Area of the circle = πr2
= `22/7 xx 21/2 xx 21/2`
= `(11 xx 3 xx 21)/2`
= `693/2`
= 346.5 cm2
Area of shaded region = (346.5 – 98 – 49)
= 199.5 cm2
APPEARS IN
RELATED QUESTIONS
Identify the net which can be used to make cube (cut out copies of the net and try it):
Identify the net which can be used to make cube (cut out copies of the net and try it):
Match the nets with appropriate solids:
| (a) |  |
(i) |  |
| (b) |  |
(ii) |  |
| (c) |  |
(iii) |  |
| (d) |  |
(iv) |  |
In a three-dimensional shape, diagonal is a line segment that joins two vertices that do not lie on the ______ face.
A pentagonal prism has ______ faces.
Every solid shape has a unique net.
Use isometric dot paper to draw figure.
A rectangular prism with length 4 units, width 2 units and height 2 units.
Find the area of the shaded portion in the following figure.
Find the volume of the given figure if volume = base area × height.
Work out the surface area of following shape (use π = 3.14).
Work out the surface area of following shape (use π = 3.14).
A sphere has ______ vertex, ______ edge and ______ curved surface.
The circle, the square, the rectangle and the triangle are examples of plane figures.
The circle, the square, the rectangle and the triangle are examples of plane figures.
The circle, the square, the rectangle and the triangle are examples of plane figures.
The circle, the square, the rectangle and the triangle are examples of plane figures.
The circle, the square, the rectangle and the triangle are examples of plane figures.
