The lengths of the two sides of an isosceles triangle are 4 and 7 respectively, find the circumferen

Hello! There are two possibilities for two waists and 7 as the bottom, so the circumference is 4 + 4 + 7 = 16

For two waists, 4 is the base, so the circumference is 7 + 7 + 4 = 18

Solution: Because 4+4=8 7, you can judge the side corresponding to 4, which can be the waist or the bottom edge.

1) When the length of the waist is 4, the circumference of the isosceles triangle is s=4+4+7=15.

2) When the length of the base edge is 4, the side length of the isosceles triangle is s=4+7+7=18.

Thus, the circumference of the isosceles triangle may be 15 or 18.

1. When the waist length is 4, the circumference is 4+4+7=15

2. When the waist length is 7, the circumference is 4+7+7=18

An isosceles triangle is one in which two sides are equal. If an edge is 4 or 7, the perimeter is 4+7+4=15 4+7+7=18

First of all, an isosceles triangle should have two equal sides, so there are two possibilities, two sides of length 4 or two sides of length 7, and both must satisfy the sum of the two sides of the third side, verified 4+4 7, 7+7 4, so the length of the triangle side is or, that is, the circumference is 18 or 15

When the third side is 4, 4 4 7 can form an isosceles triangle, and when the third side is 7, 7 7 4 can also form an isosceles triangle, so its circumference is 15 or 18

There are two steps: 1 if the waist is 4 then if 7 then 18

When 7 is the waist and 4 is the bottom; 7-4 7 7 + 4, can form a three-only spring horn shape, at this time the perimeter = 7 + 7 + 4 = 18;

When 7 is the bottom and 4 is the waist, the sedan is wide; 7-4 4 7+4, can form a triangle, at this time the circumference = 4 + 4 + 7 = 15 refers to resistance.

So the answer is: 15 or 18

When the waist is 7, the girth = 7 + 7 + 3 = 17;

When the waist length fiber surplus is 3, according to the trilateral relationship of the triangle, it can be seen that this situation is not valid;

According to the trilateral relationship of the triangle, it can be seen that the waist length of the isosceles triangle can only be 7, and the circumference of this triangle is 17, so the answer is: 17

When 2 is the waist, 2+2=4, so this situation does not exist;

When 4 is the waist, 2+4 sells the hand to call the Kai 4, which is in line with the meaning of the title Therefore, the circumference of the triangle = 2 + 4 + 4 = 10 potato closed.

So the answer is: 10

Since it is known that it is an isosceles triangle, there must be two sides that are equal. Let's assume that the two sides are equal and have a side length of 7 cm. 7+7 is equal to 14 4, satisfying that the sum of the two sides of the triangle is greater than the third side.

Then the circumference of the triangle is equal to 14+4 equal to 18cm. If the two sides of the triangle are 4cm long, 4+4 8 7, the sum of the two sides of the triangle is greater than the third side. then the circumference is equal to 4+4+7 15cm.

Because 3 and 4 form both sides of an isosceles triangle, they all match when 3 or 4 is the waistThe difference between the two sides "The third side" The sum of the two sidesSo.

Answer:Circumference p=3+3+4=or 3+4+4=

Note:For example, 3 and 7 form two sides of an isosceles triangle, then because the difference between the two sides 7-3 does not < 3, there is no such thing as 3,3,7, but only 3,7,7, so the circumference p=3+7+7=17 is the only case.

Solution: If the isosceles side is 3, the circumference = 3 + 3 + 4 = 10

If the isosceles side is 4, the circumference = 4 + 4 + 3 = 11

This needs to know what the waist length is, if the waist is 3, the girth is 3+3+4=10, if the waist length is 4, the girth is 4+4+3=11.

According to the fact that the sum of the two sides of the triangle is greater than the third side, there are two cases of this isosceles triangle, namely, circumference: 3+3+4=10, 4+4+3=11.

When the bottom edge of the orange beard grows into 2 roots and 3.

Waist length round yard = (4 3 + 7-2 3) 2 = 3 + 7 22 ( 3 + 7 2) 2 3 symbols to make an absolute triangle trilateral relationship.

When the waist length is 2 3. Bottom edge = 4 3 + 7-2 * 2 3 = 72 3 + 2 3 = 4 3 7 does not fit the trilateral relationship of the triangle.

Therefore, the waist length is 3+7 2

By observation, the waist length may be 4 or 7

So when the waist length is 4, the girth is 4+4+7=15;

When the waist length is 7, the girth is 7+7+4=18

7。Because the sum of the two sides must be greater than the third side, and the subtraction of the judgment must be less than the third side. In the isosceles triangle, there are two sides of each other, etc., from the question can be changed to hail to know either 7 or < 7, to sum up is 7.

7。Because the sum of the two sides must be greater than the third side, 3+3<7,