ICSE Class 9: Properties of Isosceles Triangle Videos | Properties of Isosceles Triangle
Properties of Isosceles Triangle
Establish the relation between equal sides and angles in a triangle. Apply theorems and corollaries about isosceles triangles to solve problems.
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- In triangle ABC the internal bisector of angle A and the external bisector of angle C intersect each other at point O . Prove that 2 angle AOC = angle B .
- In triangle ABC , AB=AC=x BC=10cm. Area of Triangle ABC =60cm² then x=? What will be the answer among option a)12cm b)13cm c)14cm d) none? *Explain the process and method used.*
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- In chapter triangles and isosceles triangles, is there any way to learn them easily?
- The altitude drawn to the base of an isosceles triangle is 8 cm and the perimeter is 32 cm. Find the area of the triangle.
- In triangle ABC the bisector of angle ABC and ACB meet at O.If OB=OC prove that triangle ABC is an isosceles triangle.
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Q 7
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Q 16
- An isosceles triangle ABC has AC =B,C. CD bisects AB at D and angle CAB = 55degree. Find :(1) angle DCB (2) angle CBD.