The circumference of an isosceles trapezoid is 80 cm. The upper and lower heights are 20 cm and 30 cm respectively. How many centimeters is the waist length of this isosceles trapezoid?

The circumference of an isosceles trapezoid is 80 cm. The upper and lower heights are 20 cm and 30 cm respectively. How many centimeters is the waist length of this isosceles trapezoid?

(80-30-20)/2=15

The circumference of an isosceles trapezoid is 50cm. Its area is 84 square centimeter and its height is 6cm. How many centimeters is its waist length

hjb133,
The sum of the two bottoms is as follows:
84 × 2 △ 6 = 28 (CM)
One waist length:
(50-28) △ 2 = 11 (CM)

A 48 cm long wire is used to form an isosceles trapezoid. The sum of the two waist lengths is 24 cm and the height is 8 cm. Its area is___ Square meters

（48-24）×8÷2
=24×8÷2
=96 (square centimeter)
96 square centimeter = 0.0096 square meter
A: its area is 0.0096 square meters
Therefore, the answer is: 0.0096

Xiaohua uses a piece of iron wire to form an isosceles trapezoid with an upper base of 8 cm, a bottom of 6 cm and a waist length of 7 cm. How long is this wire?

8 + 6 (7X2) = 14 + 14 = 28cm

A 48 cm long wire is used to form an isosceles trapezoid. The sum of the two waist lengths is 24 cm and the height is 8 cm. Its area is___ Square meters

（48-24）×8÷2
=24×8÷2
=96 (square centimeter)
96 square centimeter = 0.0096 square meter
A: its area is 0.0096 square meters
Therefore, the answer is: 0.0096

An 18 cm long wire can be used to enclose an equilateral triangle with a side length of () cm, or an equilateral triangle with a bottom of 8 cm and a waist of () cm

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An 18 cm long wire can be used to enclose an equilateral triangle with a side length of (6) cm, or an isosceles triangle with a base of 8 cm and a waist of (5) cm
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A piece of iron wire can just form a rectangle with a length of 8 cm and a width of 6 cm. Now use this wire to make a square. What's the area

Perimeter of wire = 8 * 2 + 6 * 2 = 28
Then the side length of the square = 28 / 4 = 7
So the area of the square is 7 * 7 = 49

Use 24 cm long wire to form a rectangle with a length of 8 cm. What is the area of this rectangle?

2x8 = 16cm 24-16 = 8cm 8 △ 2 = 4cm 4x8 = 32cm

A 48CM long wire is used to form an isosceles trapezoid. The sum of the two waist lengths is 24cm, the height is 6cm and the area is () square centimeter

Sum of upper and lower bottom = 48-24 = 24cm
Area = 24 × 6 × 1 / 2 = 72 square centimeter

A 48 cm long iron wire encircles an isosceles trapezoid. The two waists are 12 cm long and 8 cm high, with an area of（

Sum of upper and lower bottom: 48-12-12 = 24cm
S = 24×8÷2 = 96 （cm²）
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