Forum

Circles

The angles subtended by a chord at any two points of a circle are equal.

06/11/2024

Mathematics

9th

Circles

ABCD is a cyclic quadrilateral such that AB is a diameter of the circle circumscribing it and ∠ADC = 140º, then ∠BAC is equal to:

(A) 80º (B) 50º (C) 40º (D) 30º

06/11/2024

Mathematics

9th

Circles

If AB = 12 cm, BC = 16 cm and AB is perpendicular to BC, then the radius of the circle passing through the points A, B and C is :
(A) 6 cm (B) 8 cm
(C) 10 cm (D) 12 cm

06/11/2024

Mathematics

9th

Circles

AD is a diameter of a circle and AB is a chord. If AD = 34 cm, AB = 30 cm, the
distance of AB from the centre of the circle is :
(A) 17 cm (B) 15 cm (C) 4 cm (D) 8 cm

06/11/2024

Mathematics

9th

Areas of Parallelograms & Triangles

If the medians of a ∆ ABC intersect at G, show that ar (AGB) = ar (AGC) = ar (BGC) = 1/3 ar (ABC)

06/11/2024

Mathematics

9th

Resources

Complete the statement.
Non-renewable resources are
(a) those which have limited stock
(b) made by human beings
(c) derived from non-living things

06/11/2024

SST

8th

Areas of Parallelograms & Triangles

In ∆ ABC, if L and M are the points on AB and AC, respectively such that LM || BC. Prove that ar (LOB) = ar (MOC)

06/11/2024

Mathematics

9th

Resources

Which one of the following is a human made resource?
(a) medicines to treat cancer
(b) spring water
(c) tropical forests

06/11/2024

SST

8th

Areas of Parallelograms & Triangles

ABCD is a trapezium in which AB || DC, DC = 30 cm and AB = 50 cm. If X and Y are, respectively the mid-points of AD and BC,
prove that ar (DCYX) = 7/9 ar (XYBA)

06/11/2024

Mathematics

9th

Resources

Which one of the following does NOT make substance a resource?
(a) utility (b) value (c) quantity

06/11/2024

SST

8th