Question
O is the circum centre of the isosceles ∆ ABC. Given that AB = AC = 5 cm and BC = 6
O is the circum centre of the isosceles ∆ ABC. Given that AB = AC = 5 cm and BC = 6
cm. The radius of the circle is
Use PGT in ∆OBD r2 - (4 – r)2 = 9 (r+4-r)(r-4+r) = 9 4(2r – 4) = 9 2r – 4 = 9/4 2r = 9/4 + 4 = 25/4 r = 25/8 => 3.125 cmMore Geometry Questions
- PQRS is a cyclic quadrilateral of which PQ is the diameter. Diagonals PR and QS intersect at A. If SQR = 25°, then angle PAS measures
- Question 2
- ∆ABC and ∆DEF are similar and their areas are respectively 49cm2 and 64cm 2 . If EF = 12 cm BC is?
- In ∆ABC , G is the centroid , AB = 12 cm, BC= 16 cm and AC = 20 cm , find GD, where D is the mid-point of BC?
- Question 5
- ∆ ABC is similar to ∆ DEF. If area of ∆ABC is 9 sq.cm and area of ∆DEF is 16 sq.cm and BC = 2.1 cm. Then the length of EF will be
- Question 7
- If O is the orthocentre of ΔABC , if ∠ BOC = 1000 then what is the measure of ∠ BAC?
- If O is circumcentre of acute angled triangle ABC, if ∠ BOC = 100˚ then ∠ BAC = ?
- In ∆ABC, AB = 5cm, BC = 6cm and AC = 10cm then find out the value of cos A?
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