If the two sides of an isosceles triangle are 3 and 6, then the circumference of the isosceles triangle is () A. 12b. 15C. 12 or 15d. 18

If the two sides of an isosceles triangle are 3 and 6, then the circumference of the isosceles triangle is () A. 12b. 15C. 12 or 15d. 18

① When 3 is the bottom, the other two sides are 6, 3, 6, 6 can form a triangle, the perimeter is 15; when 3 is the waist, the other two sides are 3 and 6, ∵ 3 + 3 = 6 = 6, ∵ can not form a triangle, so the answer is only 15

Given that the lengths of the two sides of an isosceles triangle are 5 and 10 respectively, the circumference of the isosceles triangle is

If the waist is 5
Because 5 + 5 = 10
The sum of two sides is greater than the third side
So the waist is 10
So perimeter = 10 + 10 + 5 = 25

It is known that if one side of an isosceles triangle is 6 and the other side is 3, then the circumference of the isosceles triangle is ()
A. 9b. 12C. 15d. 12 or 15

∵ the length of one side of an isosceles triangle is equal to 6, and the length of the other side is equal to 3. ∵ ① when the waist is 6, the perimeter of the triangle is 6 + 6 + 3 = 15; ② when the waist is 3, 3 + 3 = 6, the triangle is not tenable; ∵ the perimeter of the isosceles triangle is 15

An isosceles triangle is 7 on one side and 9 on the other. The circumference of this isosceles triangle is

When 7 is the base and 9 is the waist length, the circumference is:
7+9+9=25
When 9 is the base and 7 is the waist length, the circumference is:
9+7+7=23
So the perimeter of this isosceles triangle is 25 or 23