Question

Which of the following statement is false?
(a) All isosceles triangles are similar.
(b) All equilateral triangles are similar.
(c) All circles are similar.
(d) None of the above

Answer 1

(a) All isosceles triangles are similar - untrue

Step-by-step explanation:

Statement A is False.

All isosceles triangles are not similar.

An isosceles triangle is one in which 2 out of the 3 sides are equal in length and that their 2 base angles are equal. Two isosceles triangles can individually have two sides equal, but they may not be similar as their sides could be of different measurement.

Equilateral triangles are similar and all circles are similar.

Answer 2

Given :  Few statements

To Find :  Which of the following statement is false?

(a) All isosceles triangles are similar.

(b)  All equilateral triangles are similar.

(c) All circles are similar.

(d) None of the above

Solution:

(a) All isosceles triangles are similar.

This is False

For example two triangles with sides

3 , 3 , 4  and  3 , 3 , 5

both are isosceles but not similar

Hence  All isosceles triangles are similar.  is FALSE

3/3 = 3/3 ≠ 4/5  

All equilateral triangles are similar.

TRUE  

as All three angles of  equilateral triangles are 60°

Hence corresponding angles of equilateral triangles are equal

so Similar

TRUE

All circles are similar. = TRUE

Learn More:

Ratio of area of 2 similar triangles are 2:3. Area of the larger triangle is

brainly.in/question/7877543

if triangle abc- triangle def area of triangle abc is 64 square ...

brainly.in/question/14594418

Three triangles are marked out of a bigger triangle at the three ...

brainly.in/question/8018381