Practice Exercise 15 (11.15) - Chapter 3 : Quadrilaterals - CBSE Class 9 Maths
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Exercise 15

Practice - Exercise 15

Learning

Practice Questions

Test your understanding with targeted questions

Question 1 Easy

Find the measure of the fourth angle of a quadrilateral if the other three angles are 110°, 85°, and 95°.

💡 Hint: Use the angle sum property!

Question 2 Easy

In a parallelogram, one angle is 60°. Find the three remaining angles.

💡 Hint: Remember that opposite angles are equal.

1 more question available

Interactive Quizzes

Quick quizzes to reinforce your learning

Question 1

What is the sum of the interior angles of a quadrilateral?

180°
360°
540°

💡 Hint: Remember the formula for angle sums!

Question 2

True or False: A square is a type of parallelogram.

True
False

💡 Hint: Think about the properties of squares!

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Challenge Problems

Push your limits with advanced challenges

Challenge 1 Hard

Prove that the diagonals of a kite intersect at right angles.

💡 Hint: Consider triangles formed by the diagonals.

Challenge 2 Hard

If given a trapezium with lengths of parallel sides and height, calculate the area.

💡 Hint: What values do you have for a, b, and h?

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Reference links

Supplementary resources to enhance your learning experience.