All the Congruent angles are equal in ______________

Academic Mathematics NCERT Class 8

All the congruent angles are equal in Equilateral triangle.

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Updated on: 10-Oct-2022

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Prove that if chords of congruent circles subtend equal angles at their centres, then the chords are equal.
Recall that two circles are congruent if they have the same radii. Prove that equal chords of congruent circles subtend equal angles at their centres.
Prove that if chords of congruent circles subtend equal angles at their centres, then chords are equal.
Prove that, in a parallelogram1)opposite sides are equal 2) opposite angles are equal 3) Each diagonal will divide the parallelogram into two congruent triangles
Fill in the blanks by using the correct word given in brackets.(i) All circles are ______ (congruent, similar)(ii) All squares are______ (similar, congruent)(iii) All _______ triangles are similar. (isosceles, equilateral)(iv) Two polygons of the same number of sides are similar, if (a) their corresponding angles are _______ and (b) their corresponding sides are ________.(equal, proportional)
If the areas of two similar triangles are equal, prove that they are congruent.
A parallelogram whose all sides are equal opposite angles are equal opposite sides are parallel is called a rhombus. Why? Why not square?
Two angles of a triangle are equal and the third angle is greater than each of those angles by $30^o$. Determine all the angles of the triangle.
In an isosceles triangle, the base angles are equal. The vertex angle is 50°. What are the base angles of the triangle?
Fill in the blanks using the correct word given in brackets:(i) All circles are ____________. (congruent, similar)
Fill in the blanks using the correct word given in brackets: (ii) All squares are ___________. (similar, congruent)
The angles of quadrilateral are in the ratio $3: 5: 9: 13 $ Find all the angles of the quadrilateral.
The angles of a triangle are in A.P. The greatest angle is twice the least. Find all the angles.
Which of the following statements are true (T) and which are false (F)?If all the angles of a quadrilateral are equal, it is a parallelogram.

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