CBSE Class 8 Mental Maths Understanding Quadrilaterals Worksheet
CBSE Class 8 Mental Maths Understanding Quadrilaterals Worksheet with Solution by Expert Mathematician. Students of 8th Grade can solve this worksheet for extra preparation before exam.Private Teacher or Guardians of the Students can copy all the questions of this chapter and will match after solve their students.
Understanding Quadrilaterals Class 8 Worksheet
1.) What is the number of diagonal in a 6 sided polygon?
2.) What will be the sum of interior angles of a polygon having 8 sides?
3.) Find out the number of sides of a regular polygon whose exterior angles are 60°.
4.) The sides of a quadrilateral are in the ratio of 2:5:4:1. Find out the sum of the smallest and largest angles.
5.) If the area of a square field is 144 sq m. Then find the perimeter.
6.) If the base of a triangle is 3 cm and height is 6 cm then find the area.
7.) A square field has a diagonal of 8 m. Then find out the area of the field.
8.) Find out the area of a equilateral triangle which has a side of 16 cm.
9.) The area of a parallelogram is 108 sq cm. If the height is 12 cm. Then find out the length of the base.
10.) Write down the formula of area of rhombus.
11.) A room has a length of 10 m, breadth of 5m and height of 8 m. Find out the area of the room.
12.) The length of one side of a rhombus is 6.5 centimeters and its altitude is 10 centimeter. if the length of one side of its diagonals is 26 centimeter find the length of the other diagonal.
13.) If three angles of a trapezium is 50°, 130° and 120°. Then find the other angle.
14.) Can all the angles of a quadrilateral be right angles?
15.) If two adjacent angles of a parallelogram are in the ratio 2:3 Find all the angles of the parallelogram.
16.) if the angles of a quadrilateral are in the ratio 3:6:8:13. The largest angle is?
17.) Name the quadrilateral whose diagonals are equal.
18.) Each angle of a square measures ___°.
19.) diagonals of a quadrilateral ABCD bisect each other. If A=45°. Then B=?
20.) How many parallel lines are in a trapezium?
21.) Which figure is equiangular and equilateral polygons?
22.) The angles of a quadrilateral are x°, x+5°, x+10°, x+25°. Then find the value of x.
23.) If the diagonals of a quadrilateral are perpendicular bisectors of each other then it is always a______.
24.) the sum of all angles in a quadrilateral is equal to_____ right angles.
25.) It rhombus also satisfied the properties of a_______.
Answers
- 6(6-2)/2
=12
- (8-2)×180°
=6×180°
=1080°
- 360°/60°
=6
- 2x+5x+4x+x= 360°
12x=360°
X=30°
So, 5x= 150°
X=30°
Therefore, 150+30°
=180°
- Side= √144
=12m
So, perimeter =12×4 m
=48m
- ½ ×3×6 cm sq
=9 sq cm
- ½ (8)^2
=32 cm sq
- √3/4 × 16×16 cm sq
=64√3 cm sq
- 108/12 cm
=9cm
- ½ × product of diagonals
- 2×(10+15)×8 sq m
= 400 cm sq
- Area= 6.5×10 cm sq
= 65sq. Cm
Let, other diagonal=x cm
So, ½ × x ×26=65
X=5cm.
- 360°- (50+130+120)°
=60°
- P=2x
Q=3x
So, 5x=180°
Therefore x=36°
So, P=72° and Q=108°
So R= 72° {opposite of P}
S=108° {opposite of Q}
- 3x+6x+8x+13x=360
X=150°
- Square, rectangles
- 90°
- A+B=180°
45°+B=180°
So, B=135°
- 2
- Square
- X+(x+5)+(x+10)+(x+25)=360
X=80°
- Rhombus
- 4
- Parallelogram