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Practical Geometry Symmetry & Visualising Solid Shapes

A triangle can be constructed by taking two of its angles as:
(a) 110°, 40° (b) 70°, 115° (c) 135°, 45° (d) 90°, 90°

Practical Geometry Symmetry & Visualising Solid Shapes

A triangle can be constructed by taking its sides as:
(a) 1.8 cm, 2.6 cm, 4.4 cm (b) 2 cm, 3 cm, 4 cm
(c) 2.4 cm, 2.4 cm, 6.4 cm (d) 3.2 cm, 2.3 cm, 5.5 cm

Practical Geometry Symmetry & Visualising Solid Shapes

Construct a triangle PQR such that PQ = 6 cm, QR = 7 cm and PR = 4.5 cm.

Practical Geometry Symmetry & Visualising Solid Shapes

In Example state whether the statement are True or False

A regular pentagon has no lines of symmetry.

Practical Geometry Symmetry & Visualising Solid Shapes

In Example state whether the statement are True or False

A net of a 3-D shape is a sort of skeleton – outline in 2-D,
which, when folded results in the 3-D shape.

Practical Geometry Symmetry & Visualising Solid Shapes

Rotation turns an object about a fixed point. This fixed point is called _______.

Practical Geometry Symmetry & Visualising Solid Shapes

The figure 12.3 has ________ vertices, __________ edges and __________ faces.

Practical Geometry Symmetry & Visualising Solid Shapes

In the word “MATHS” which of the following pairs of letters shows rotational symmetry

(a) M and T (b) H and S (c) A and S (d) T and S

Exponents & Powers

Express the following numbers in standard form:
(a) 76,47,000 (b) 8,19,00,000
(c) 5, 83,00,00,00,000 (d) 24 billion

Exponents & Powers

Express each of the following as a product of powers of their prime factors:
(a) 9000 (b) 2025 (c) 800