Question Answers

4. From a point P which is at a distance of 13 cm from the centre O of a circle of radius 5 cm, the pair of tangents PQ and PR to the circle are drawn. Then the area of the quadrilateral PQOR is 4. From a point P which is at a distance of [...]

3. In Fig. 9.4, AB is a chord of the circle and AOC is its diameter such that ∠ACB = 50°. If AT is the tangent to the circle at the point A, then ∠BAT is equal to 3. In Fig. 9.4 AB is a chord of the circle and AOC is its diameter such [...]

2. In Fig. 9.3, if ∠AOB = 125°, then ∠COD is equal to 2. In Fig. 9.3 if ∠AOB = 125° then ∠COD is equal to July 5, 2021 Category: Chapter 10 - Circles , Maths , NCERT Class 10 ,

1. If radii of two concentric circles are 4 cm and 5 cm, then the length of each chord of one circle which is tangent to the other circle is 1. If radii of two concentric circles are 4 cm and 5 cm then the length of each chord of one circle which is tangent [...]

In Fig. 6.15, if ∆ ABC ~ ∆ DEF and their sides are of lengths (in cm) as marked along them, then find the lengths of the sides of each triangle. if ∆ ABC ~ ∆ DEF and their sides are of lengths (in cm) as marked along them In Fig. 6.15 then find the [...]

An aeroplane leaves an Airport and flies due North at 300 km/h. At the same time, another aeroplane leaves the same Airport and flies due West at 400 km/h. How far apart the two aeroplanes would be after 1(1 / 2) hours? An aeroplane leaves an Airport and flies due North at 300 km/h. At [...]

Prove that if in a triangle square on one side is equal to the sum of the squares on the other two sides, then the angle opposite the first side is a right angle. Prove that if in a triangle square on one side is equal to the sum of the squares on the other [...]

In Fig 6.13, OB is the perpendicular bisector of the line segment DE, FA ⊥ OB and F E intersects OB at the point C. Prove that 1 / OA + 1 / OB = 2 / OC. FA ⊥ OB and F E intersects OB at the point C. Prove that 1 / OA [...]

In Fig 6.7, ∠D = ∠E and AD / DB = AE / EC. Prove that BAC is an isosceles triangle. ∠D = ∠E and AD / DB = AE / EC. Prove that BAC is an isosceles triangle. In fig. 6.7 July 5, 2021 Category: Chapter 6 - Triangles , Maths , NCERT Class [...]

Hypotenuse of a right triangle is 25 cm and out of the remaining two sides, one is longer than the other by 5 cm. Find the lengths of the other two sides. Hypotenuse of a right triangle is 25 cm and out of the remaining two sides one is longer than the other by 5 [...]