Class 10 Maths
Constructions
Ex.11.1 Q.1
Draw a line segment of length 7.6 cm and divide it in the ratio 5: 8.
Measure the two parts. Give the justification of the construction.
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Ex.11.1 Q.2
Construct a triangle of sides 4 cm, 5cm and 6cm and then a triangle similar to it whose sides are
of the corresponding sides of the first triangle. Give the justification of the construction.
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Ex.11.1 Q.3
Construct a triangle with sides 5 cm, 6 cm and 7 cm and then another triangle whose sides are
of the corresponding sides of the first triangle. Give the justification of the construction.
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Ex.11.1 Q.4
Construct an isosceles triangle whose base is 8 cm and altitude 4 cm
and then another triangle whose side are 1 times the corresponding sides of the isosceles triangle.
Give the justification of the construction.
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Ex.11.1 Q.5
Draw a triangle ABC with side BC = 6 cm, AB = 5 cm and ∠ABC = 60°.
Then construct a triangle whose sides are of the corresponding sides of the triangle ABC.
Give the justification of the construction.
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Ex.11.1 Q.6
Draw a triangle ABC with side BC = 7 cm, ∠B = 450, ∠A = 1050.
Then, construct a triangle whose sides are times the corresponding side of ∆ABC.
Give the justification of the construction.
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Ex.11.1 Q.7
Draw a right triangle in which the sides (other than hypotenuse) are of lengths 4 cm and 3 cm.
the construct another triangle whose sides are times the corresponding sides of the given triangle.
Give the justification of the construction.
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Ex.11.2 Q.1
Draw a circle of radius 6 cm. From a point 10 cm away from its centre,
construct the pair of tangents to the circle and measure their lengths.
Give the justification of the construction.
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Ex.11.2 Q.2
Construct a tangent to a circle of radius 4 cm from a point on the concentric circle of radius 6 cm and measure its length.
Also verify the measurement by actual calculation.
Give the justification of the construction.
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Ex.11.2 Q.3
Draw a circle of radius 3 cm.
Take two points P and Q on one of its extended diameters each at a distance of 7 cm from its centre.
Draw tangents to the circle from these two points P and Q. Give the justification of the construction.
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Ex.11.2 Q.4
Draw a pair of tangents to a circle of radius 5 cm which are inclined to each other at an angle of 600.
Give the justification of the construction.
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Ex.11.2 Q.5
Draw a line segment AB of length 8 cm.
Taking A as centre, draw a circle of radius 4 cm and taking B as centre, draw another circle of radius 3 cm.
Construct tangents to each circle from the centre of the other circle. Give the justification of the construction.
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Ex.11.2 Q.6
Let ABC be a right triangle in which AB = 6 cm, BC = 8 cm and ∠B = 900. BD is the perpendicular from B on AC.
The circle through B, C, and D is drawn.
Construct the tangents from A to this circle. Give the justification of the construction.
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Ex.11.2 Q.7
Draw a circle with the help of a bangle. Take a point outside the circle.
Construct the pair of tangents from this point to the circles. Give the justification of the construction.
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