All _____ triangles are similar. (isosceles, equilateral)
For two triangles to be similar the angles in one triangle must have same value as the angles in another triangle. The sides must be also be proportionate.
So, isosceles triangles are not similar.
Hence, all equilateral triangles are similar.
All equilateral triangle are isosceles, but not all isosceles are equilateral. why ?
Fill in the blanks using correct word given in the 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)