An isosceles triangle has a circumference of 18 decimeters, a waist of 7 decimeters, a height of 3 decimeters at the bottom, and an area of ()

An isosceles triangle has a circumference of 18 decimeters, a waist of 7 decimeters, a height of 3 decimeters at the bottom, and an area of ()

The base length is 4 and the area is 6

What's the waist length of his triangle? It's six centimeters in circumference?

(18-7-7)*5.6/2=11.2

The base of an isosceles triangle is 15 cm, the waist is a cm, and the height on the base is B cm______ Centimeter. The area is______ Square centimeter

Circumference of triangle: (15 + 2a) cm,
Area of triangle: 15 × B △ 2 = 15
2B (square centimeter);
So the answer is: 15 + 2A; 15
2b；

An isosceles triangle has a circumference of 48 cm, a waist length of 15 cm and a height of 10 cm on the bottom edge. What is the area of this isosceles triangle

48 - (15 times 2) = 18 (CM) 18 times 10 divided by 2 = 90 (square centimeter)
A: the area of this isosceles triangle is 90 square centimeters

The circumference of an isosceles triangle is 18 decimeters, the waist is 5 decimeters, and the height on the bottom is 3 decimeters. How many square decimeters is its area?

Because of the isosceles triangle, the circumference is equal to waist * 2 + bottom, so the base = 18-10, so the area = 1 / 2 * 8 * 3 = 12

In order to know that the two sides of an isosceles triangle are 5 cm and 8 cm long respectively, the maximum circumference of this triangle is () and the minimum is ()

The maximum is 21 and the minimum is 18

The circumference of an isosceles triangle is 36cm, one side is 8cm, the other two sides are______ .

∵ when the waist is 8cm, the bottom edge length = 36-8-8 = 20cm, and ∵ 8 + 8 < 20, which can not form a triangle;
When the base is 8cm, the waist of the triangle = (36-8) △ 2 = 14cm, ﹥ the length of the other two sides is 14cm, 14cm
So fill in 14cm, 14cm

If the two sides of an isosceles triangle are 6cm and 8cm long, then the base length is perimeter (a few points)

Perimeter: 6 + 6 + 8 = 20 (CM)
The bottom edge is perimeter: 8 / 20 = 2 / 5

One side of an isosceles triangle is 8 cm long and the other side is 3.5 cm long

8>3.5x2
So 8 is the waist
Perimeter 8 + 8 + 3.5 = 19.5cm

If the two sides of an isosceles triangle are 5cm and 8cm respectively, then its circumference is at most______ Cm, at least______ Cm. (the third side is the whole centimeter.)

Because the two sides of the isosceles triangle are 5 and 8 cm
So the three sides of an isosceles triangle may be 5, 5, 8 or 5, 8, 8
So the circumference may be 5 + 5 + 8 = 18 cm,
Or 5 + 8 + 8 = 21 cm
So the answer is: 21, 18