Question

Write true and false against each of the given statements.
(a) Diagonals of a rhombus are equal.
(b) Diagonals of rectangles are equal.
(c) Kite is a parallelogram.
(d) Sum of the interior angles of a triangle is 180°.
(e) A trapezium is a parallelogram.
(f) Sum of all the exterior angles of a polygon is 360°.
(g) Diagonals of a rectangle are perpendicular to each other.
(h) Triangle is possible with angles 60°, 80° and 100°.
(i) In a parallelogram, the opposite sides are equal.

Answer 1

Answer:

Question 1.

In the given figure, ABCD is a parallelogram. Find x.

Understanding Quadrilaterals NCERT Extra Questions for Class 8 Maths Q1

Solution:

AB = DC [Opposite sides of a parallelogram]

3x + 5 = 5x – 1

⇒ 3x – 5x = -1 – 5

⇒ -2x = -6

⇒ x = 3

Question 2.

In the given figure find x + y + z.

Understanding Quadrilaterals NCERT Extra Questions for Class 8 Maths Q2

Solution:

We know that the sum of all the exterior angles of a polygon = 360°

x + y + z = 360°

Answer 2

(a)True

(b)True

(c)True

(d)True

(e)False

(f)True

(g)False

(h) False

(i)True

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