Forum

Triangles

If in two right triangles, one of the acute angles of one triangle is equal to an acute angle of the other triangle, can you say that the two triangles will be similar? Why?

08/11/2024

Mathematics

10th

Triangles

Two sides and the perimeter of one triangle are respectively three times the corresponding sides and the perimeter of the other triangle. Are the two triangles similar? Why?

08/11/2024

Mathematics

10th

Triangles

Is the following statement true? Why?
“Two quadrilaterals are similar, if their corresponding angles are equal”.

08/11/2024

Mathematics

10th

Triangles

A and B are respectively the points on the sides PQ and PR of a triangle PQR such that PQ = 12.5 cm, PA = 5 cm, BR= 6 cm and PB = 4 cm. Is AB|| QR?Give reasons for your answer.

08/11/2024

Mathematics

10th

Triangles

It is given that ΔDEF ~ ΔRPQ. Is it true to say that ∠D = ∠R and ∠F = ∠P? Why?

08/11/2024

Mathematics

10th

Triangles

P and Q are the points on the sides DE and DF of a triangle DEF such that DP = 5 cm, DE = 15 cm, DQ= 6 cm and QF = 18 cm. Is PQ|| EF? Give reasons for your answer

08/11/2024

Mathematics

10th

Triangles

 In ΔABC, AB = 24 cm, BC = 10 cm and AC = 26 cm. Is this triangle a right triangle? Give reasons for your answer.

08/11/2024

Mathematics

10th

Triangles

If S is a point on side PQ of a ΔPQR such that PS = QS = RS, then
(A) PR . QR = RS2
(B) QS2 + RS2 = QR2
(C) PR2 + QR2= PQ2
(D) PS2 + RS2= PR2

08/11/2024

Mathematics

10th

Triangles

It is given that ΔABC DFE, A =30°, C = 50°, AB = 5 cm, AC = 8 cm and DF= 7.5 cm. Then, the following is true:
(A) DE = 12 cm, F = 50° (B) DE = 12 cm, F = 100°
(C) EF = 12 cm, D = 100° (D) EF = 12 cm, D = 30°

08/11/2024

Mathematics

10th

Biodiversity and Conservation

Can you think of a situation where we deliberately want to make a species extinct? How would you justify it?

08/11/2024

Biology

12th (Science)