Triangle and Its Properties Class 7 Worksheets

# Triangle and Its Properties Class 7 Worksheets

## Triangle and Its Properties Class 7 Worksheets

Triangle and Its Properties Class 7 Worksheets play a vital role in strengthening the maths concepts. After studying the concepts of mathematics, revision of Triangle and Its Properties Class 7 Worksheets is very important for the students. This assesses the preparation of the students. Students can assess themselves by its own by solving the Triangle and Its Properties Class 7 Worksheets. Parents and teachers can also assess the students by giving them these Triangle and Its Properties Class 7 Worksheets to solve.

Maths-formula brings such worksheets on triangles and its properties class 7 for you. By solving these Triangle and Its Properties Class 7 Worksheets, you can increase the understanding of the concepts learnt. These Triangle and Its Properties Class 7 Worksheets are prepared by experienced teachers and subject matter experts. If you can solve the 90% of the questions correctly, it means your preparation is very good.

Thus, let us try to attempt these questions to solve and assess yourself. Parents and teachers can also give these Triangle and Its Properties Class 7 Worksheets to the students to test them. Unit tests can also be prepared by the teachers using these Triangle and Its Properties Class 7 Worksheets.

## Triangle and Its Properties Class 7 Worksheet 1

1. In triangle ABC, the ratio of the angles is 6 : 7 : 5. Find the angles.

2. Find the angles of a triangle, if they are in the ratio 1 : 2 : 3.

3. The base angles of a right-angled triangle is 10° less than the vertical angle. Find the angles.

4. If two angles of a triangle are complementary, find the third angle.

5. ABC is an isosceles triangle with AB = AC. If angle BAC  = 48°, find angle ACB and ABC.

6. If two angles of a triangle are 75° and 34°, find the third angle and hence name the type of triangle.

7. Find the unknown marked angles for the following figures:

8. Fill in the blanks.

a. A triangle is a ___________ sided figure whose angles adds up to ___________.

b. In an acute-angled triangle, all angles are less than ___________.

c. If the angles of a triangle are x, 2x and 3x, then the triangle is a ___________ triangle.

d. All sides of a scalene triangle are ___________.

e. The exterior angle of a triangle is equal to the sum of the ___________ angles.

9. Choose the correct option.

a. If one angle of a triangle is obtuse, then the other two angles are

i. 60°

ii. obtuse

iii. 90°

iv. acute

b. If one angle of an isosceles triangle is 75°, then the other two angles are

i. 75°, 30°

ii. 60°, 75°

iii. 75°, 20°

iv. 75°, 75°

c. In an isosceles right-angled triangle, the other two angles are

i. 60°, 30°

ii. 45°, 45°

iii. 50°, 40°

iv. 70°, 20°

d. If three angles of a triangle are 2x – 16°, 12x + 15°, 8x + 5°, then x is equal to

i. 8

ii. 18

iii. 16

iv. 20

## Triangle and Its Properties Class 7 Worksheet 2

1. Match the following with the correct value of ‘x’.

2.
Angles of a triangle are x + 11°, 2x – 7° and 2x + 6°. Find the angles.

3. In a triangle ABC, BC is produced to D. If <ACD = 135° and <BAC = 55°, find the remaining angle.

4. Ratio of three angles of a triangle is 5 : 7 : 3, find the angles.

5. One of the equal angles of an isosceles triangle is 65°. Find the other two angles.

6. Find the unknown marked angles.

7. State true or false.

a. A triangle has only three angles.

b. A triangle may have the given angles 30°, 60° and 90°.

c. Acute-angled triangle has one angle acute.

d. If measure of angles of a triangle are 45°, 30° and 35°, then it is an acute-angled triangle.

8. Choose the correct option.

a. An equilateral triangle has all its angles equal to

i. 60°

ii. 30°

iii. 45°

iv. 50°

b. Sum of the angles of a triangle is

i. 360°

ii. 90°

iii. 180°

iv. 270°

c. Exterior angle of a triangle is 118°. If one of the interior opposite angles is 48°, then the other interior opposite angle is

i. 45°

ii. 60°

iii. 70°

iv. 54°

d. Three angles of a triangle are in the ratio 3 : 5 : 4, then the largest angle measures

i. 75°

ii. 60°

iii. 45°

iv. 90°

Worksheet 1

1. 60°; 70°; 50°

2. 30°; 60°; 90°

3. 50°; 40°

4. 90°

5. 66°; 66°

6. 71°; Acute-angled triangle

7. a. x = 80°; y = 40°; z = 140°

b. x = 38°; y = 96°; z = 96°; a = 46°

c. x = 52°; y = 108°; z = 52°

d. x = 60°; y = 110°; z = 70°; a = 50°

e. x = 60°; y = 60°; a = 60°; b = 60°; c = 60°

8. a. three; 180°    b. 90°

c. right-angled    d. unequal

e. opposite interior

9. a. iv          b. i

c. ii            d. i

Worksheet 2

1. a. iii          b. iv

c. ii            d. i

e. v

2. 45°; 61°; 74°

3. ABC = 80°; ACB = 45°

4. 60°; 84°; 36°

5. 65°; 50°

6. a.

7. a. True        b. True

c. False        d. False

8. a. i              b. iii

c. iii             d. i

MCQs Questions for Class 7 Maths

 Maths Worksheets for Other Chapters of Class 7

15. Congruence of triangles class 7 worksheets

Some Extra Worksheets for ICSE Maths Class 7

 Maths Worksheets for Other Classes

Maths Worksheets for Class 2

Maths Worksheets for Class 3

Maths Worksheets for Class 4

Maths Worksheets for Class 5

Maths Worksheets for Class 6

Maths Worksheets for Class 8

Maths Worksheets for Class 9