PR is a tangent to a circle with centre O and radius 4 cm at point Q. If ∠POR = 90°, OR = 5 cm and OP = 20/3 cm, then the length of PR is:
Which of the following quadratic equations has real roots?
∆ABC is similar to ∆PQR. If ratio of perimeters of ∆ABC and ∆PQR is 1:2 and if PQ = 10 cm then what is the length of AB (in cm)?
cos(A+B) + cos(A-B) is equal to
Dodecahedron has 20 vertices. How many edges does it have?
What is the slope of the line parallel to the line passing through the points (3 , -4) and (-2 , 5)?
∆ABC is right angled at B. BD is an altitude. AD = 4 cm and DC = 9 cm. What is the value of BD (in cm)?
At what point does the line 2x - 3y = 6 cuts the X axis?
The 5th and 9th term of an arithmetic progression are 7 and 13 respectively. What is the 15th term?
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