It is given that ∆ABC ≅ ∆PQR, AB = 5 cm, ∠B = 40°, and ∠A = 80°. Which of the following options is true?

Each exterior angle of a regular polygon measures 9°. How many sides does the polygon have?

An isosceles triangle ABC is right angled at B.D is a point inside the triangle ABC. P and Q are the feet of the perpendiculars drawn from D on the side AB and AC respectively of ∆ ABC. If AP = a cm, AQ = b cm and ∠BAD = 15°, sin 75°=

The area of the triangle whose vertices are given by the coordinates (1, 2), (-4, -3) and (4, 1) is:

On increasing the radius of circle by 1 cm, its area is increased by 44 cm² .The original radius of the circle is -

The sides BA and DE of a regular pentagon are produced to meet at F. What is the measure of ∠EFA?

Triangle PQR is inscribed in a circle such that P, Q and R lies on the circumference . If PQ is the diameter of the circle and ∠PQR = 40 ° , then what is the value ( in degrees ) of ∠QPR ?

In △ABC, D and E are points on the sides AB and AC, respectively, such that DE || BC and DE: BC=6:7. (Area of △ ADE): (Area of trapezium BCED) = ?