Solve the following examples.(1) Find the height of an equilateral triangle having side 2a.(2) Do sides 7 cm, 24 cm, 25 cm form a right angled triangle ? Give reason.(3) Find the length a diagonal of a rectangle having sides 11 cm and 60 cm.(4) Find the length of the hypotenuse of a right angled triangle if remaining sides are 9 cm and 12 cm.(5) A side of an isosceles right angled triangle is x. Find its hypotenuse.(6) In ∆PQR; PQ = 8, QR = 5, PR = 3. Is ∆PQR a right angled triangle ? If yes, which angle is of 90°?

Solve the following examples.(1) Find the height of an equilateral tri

1.	Solve the following examples.(1) Find the height of an equilateral triangle having side 2a.(2) Do sides 7 cm, 24 cm, 25 cm form a right angled triangle ? Give reason.(3) Find the length a diagonal of a rectangle having sides 11 cm and 60 cm.(4) Find the length of the hypotenuse of a right angled triangle if remaining sides are 9 cm and 12 cm.(5) A side of an isosceles right angled triangle is x. Find its hypotenuse.(6) In ∆PQR; PQ = 8, QR = 5, PR = 3. Is ∆PQR a right angled triangle ? If yes, which angle is of 90°?
Answer» Solve the following examples. (1) Find the height of an equilateral triangle having side 2a. (2) Do sides 7 cm, 24 cm, 25 cm form a right angled triangle ? Give reason. (3) Find the length a diagonal of a rectangle having sides 11 cm and 60 cm. (4) Find the length of the hypotenuse of a right angled triangle if remaining sides are 9 cm and 12 cm. (5) A side of an isosceles right angled triangle is x. Find its hypotenuse. (6) In ∆PQR; PQ = $\sqrt{8}$ , QR = $\sqrt{5}$ , PR = $\sqrt{3}$ . Is ∆PQR a right angled triangle ? If yes, which angle is of 90°?