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#### Chapters

1 - Number Systems2 - Polynomials

3 - Coordinate Geometry

4 - Linear Equations in two Variables

5 - Introduction to Euclid's Geometry

6 - Lines and Angles

7 - Triangles

8 - Quadrilaterals

9 - Areas of Parallelograms and Triangles

10 - Circles

11 - Constructions

12 - Heron's Formula

13 - Surface Area and Volumes

14 - Statistics

15 - Probability

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### Chapter 11 - Constructions

#### Page 191

Construct an angle of 90° at the initial point of a given ray and justify the construction.

Construct an angle of 45° at the initial point of a given ray and justify the construction.

Construct the angles of the following measurement:- 30°

Construct the angles of the following measurement:- `22 1/2^@`

Construct the angles of the following measurement:- 15°

Construct the 75° angles and verify by measuring it by a protractor.

Construct the 105° angles and verify by measuring it by a protractor.

Construct the 135° angles and verify by measuring it by a protractor.

Construct an equilateral triangle, given its side and justify the construction.

#### Page 195

Construct a triangle ABC in which BC = 7 cm, ∠B = 75° and AB + AC = 13 cm.

Construct a triangle ABC in which BC = 8 cm, ∠B = 45° and AB − AC = 3.5 cm.

Construct a triangle PQR in which QR = 6 cm, ∠Q = 60° and PR − PQ = 2 cm

Construct a triangle XYZ in which ∠Y = 30°, ∠Z = 90° and XY + YZ + ZX = 11 cm.

Construct a right triangle whose base is 12 cm and sum of its hypotenuse and other side is 18 cm.

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