CBSE Class 8 Mental Maths Practical Geometry Worksheet
CBSE Class 8 Mental Maths Practical Geometry 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.
Practical Geometry Class 8 Worksheet
1.) Find the value of angle ACE
2.) ABCD is a rhombus, Find AO+OB
3.) In the given picture find the perimeter of ABCD
4.) Find the value of x
5.) Find the value of angle XZY
6.) Find the value of AED
7.) Find the value of x
8.) Find the value of BAC
9.) Find the value of x
10) The diagonals of a parallelogram bisect each other at ___° angle
11) Draw a triangle PQR in which QR=5 cm,angle Q=40° and angle R=60°
12) What is the measure of an exterior angle of an equilateral triangle given below
13) Draw a triangle ABC in which angle ABC=90°. AB=5cm, AC=7cm,BC=4cm
14) Find the value of x
15.) Find the perimeter.
16.) Find the value of x.
17.) What is triangle inequality?
18.) What are collinear points?
19.) What are concurrent lines?
20.) Draw an equilateral triangle with a base of 5cm.
21.) How many types of angles are there?
22.) What is a supplementary angle?
23.) What is a reflex angle?
24.) Draw a rhombus which has a diagonal of 5cm.
25.) What is an obtuse angle?
Answers:
- ACD=90°
SO ACE= 90-(45+35)°
10°
- 6+6=12CM
- Perimeter = 3+8+7.5+4 cm
=22.5cm
- 5x+4+3x=180°
8x=176°
X=22°
- XZY= 180°-(120+30)°
= 30°
- AED=180-45°
=135°
- X+20+50+x-10=180
X=60°
- ACB=180-(80+50)
ACB=50°
So, BAC= 180-(100+50)°
=30°
- BCD=180-85
=95°
So, DBC =180-(95+30)°
=55°
Therefore x=90-55°=35°
12.) Each angle=60°
So x=120°
14.) CBD=90-40°=50°
So,x= 180-(50+60)°
=70°
15.) Perimeter = (3+2+4+6) cm
=15cm
16.) x=100°
As both the lines are parallel
17.) Triangle inequality : when the sum of two sides of a triangle is greater than the other side it is called triangle inequality
18.) Collinear points: Three or more than three points are said to be collinear if there is a line which contains them all
19.) Concurrent lines: Three or more than three lines are said to be concurrent if there is a point which lies on all of them
21.) Acute angles, Right angles, Obtuse angle, straight angle, reflex angle, complementary angle and supplementary angle.
22.) Sum of two angles which are supplementary is 180 degree.
23.) Here r is the reflex angle.
24)
25) An angle which is greater than 90 degrees is called obtuse angle.