Selina solutions

Selina solutions

Selina solutions

Grade 6

CHAPTERS

1. Number System (Consolidating the Sense of Numberness)

3. Numbers in India and International System (With Comparison)

5. Natural Numbers and Whole Numbers (Including Patterns)

6. Negative Numbers and Integers

12. Proportion (Including Word Problems)

17. Idea of Speed, Distance and Time

18. Fundamental Concepts (Algebra)

19. Fundamental Operations (Related to Algebraic Expressions)

20. Substitution (Including Use of Brackets as Grouping Symbols)

21. Framing Algebraic Expressions (Including Evaluation)

22. Simple (Linear) Equations (Including Word Problems)

23. Fundamental Concepts (Geometry)

25. Properties of Angles and Lines (Including Parallel Lines)

26. Triangles (Including Types, Properties and Construction)

30. Revision Exercise on Symmetry (Including Constructions on Symmetry)

32. Perimeter and Area of Plane Figures

Q12) In parallelogram ABCD, ∠A = 90° (i) What is the measure of angle B. (ii) Write the special name of the paralleogram.

Solution:

In parallelogram ABCD, A = 90

(i) In a parallelogram adjacent angles are supllementary

∠A+∠B = 180°

90° +∠B = 180°

∠B = 180° - 90°

∠B = 90°

(ii) The name of the given parallelogram is a rectangle

Still have questions? Our expert teachers can help you out

Book a free class nowNumber System (Consolidating the Sense of Numberness)

Numbers in India and International System (With Comparison)

Natural Numbers and Whole Numbers (Including Patterns)

Proportion (Including Word Problems)

Idea of Speed, Distance and Time

Fundamental Concepts (Algebra)

Fundamental Operations (Related to Algebraic Expressions)

Substitution (Including Use of Brackets as Grouping Symbols)

Framing Algebraic Expressions (Including Evaluation)

Simple (Linear) Equations (Including Word Problems)

Fundamental Concepts (Geometry)

Properties of Angles and Lines (Including Parallel Lines)

Triangles (Including Types, Properties and Construction)

Revision Exercise on Symmetry (Including Constructions on Symmetry)

Perimeter and Area of Plane Figures

Solution:

In parallelogram ABCD, A = 90

(i) In a parallelogram adjacent angles are supllementary

∠A+∠B = 180°

90° +∠B = 180°

∠B = 180° - 90°

∠B = 90°

(ii) The name of the given parallelogram is a rectangle

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