Circles class 10. ABCD is a quadrilateral such that ∠D=90. A circle C(O,r) touches the sides AB, BC @AviJainClasses

Uploaded December 2020 | Updated September 2026, 2 weeks ago

Circles class 10. ABCD is a quadrilateral such that ∠D=90. A circle C(O,r) touches the sides AB, BC, CD and DA at P, Q, R and S respectively. If BC=40 cm, CD=25 cm and BP=28 cm, find r.

Circles class 10 important questions.
Circles class 10 important questions with solutions.
Circles class 10 important questions with answers.

This is the fifth video of our series on - "Circles class 10 important questions". Here you will get the best explanation on extra questions. The various questions from RD Sharma class 10 and RS Aggarwal class 10 will be solved with best possible explanation. These high quality videos are definitely going to help you in your cbse board exam and help you secure very good marks.

The other questions from circles class 10 are as follows:

Question - 1) A circle is touching the side BC of a triangle ABC at P and touching AB and AC produced at Q and R respectively. Class 10 maths chapter 10. Prove that AQ=1/2(Perimeter of triangle ABC).
youtu.be/2z2hEopgKZ0

Question - 2) In the given figure, XP and XQ are two tangents to the circle with centre O, drawn from an external point X. ARB is another tangent touching the circle at R. Prove that XA+AR=XB+BR.
youtu.be/6hCKmddIPts

Question - 3) A circle is inscribed in a triangle PQR with sides 10 cm, 8 cm and 12 cm. Find the lengths of QM, RN and PL.
youtu.be/KHPuyYYw98E

Question - 4) In the given figure, ABC is a right angled triangle right angled at A with AB=6 cm and AC=8cm. A circle with centre O has been inscribed inscribed inside the triangle. Calculate the value of r.
youtu.be/MWNtjP8IQys

Question - 6) From a point P two tangents PA and PB are drawn to a circle with centre O. If OP=2r or diameter, show that triangle APB is an equilateral triangle.
youtu.be/KxxKirHvuR0

Show that the sum of an AP whose first term is a, the second term is b and the last term is l is

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