Mensuration Class 8

Mensuration class 8 Chapter 11 important questions and formulas are mentioned here. Got through the formulas and practice the concept of mensuration with the help of given examples. This chapter 11 of Class 8 (Mensuration) is an important topic of CBSE board. Learning this topic – Mensuration will help students in scoring good marks in exams.

Mensuration Class 8 Extra Questions

By constructing EC || AB, we can split the given figure (AEDCBA) into two parts(Triangle ECD right angled at C and Rectangle AECB), Here, b = a + c = 30 m

Mensuration Class 8

Now, Area of Triangle DCE:

1/2 × CD × EC= 1/2 × c ×s

h=1/2 ×10× 12=60m2

Also, Area of rectangle AECB = AB × BC = h × a=12 × 20=240m2

Therefore, Area of trapezium AEDB = Area of Triangle DCE + Area of rectangle AECB = 60 + 240 = 300 =300m2

Area of quadrilateral ABCD

Mensuration Class 8

Diagonal AC divides the given quadrilateral into two triangles i.e. Triangle ABC and Triangle ADC.

Now, Area of Quadrilateral ABCD = Area of Triangle ABC + Area of Triangle ADC.

=1/2 × AC × h1 + 1/2 × AC × h2 =1/2 × d × (h1 +h2 )

Where, d = The length of diagonal of a quadrilateral.

Mensuration Class 8 Formulas

Mensuration Class 8

Mensuration class 8 NCERT Solutions (Examples)

Mensuration Class 8
Mensuration Class 8
Mensuration Class 8
Mensuration Class 8
Mensuration Class 8

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