Mathematics: Find the surface area of the cylinder use 3.14 for pi

x = y = 15Step-by-step explanation:Using the sine ratio and the exact valuesin45° = , thensin45° = = = ( cross- multiply )2x = 30 ( divide both sides by 2 )x = 15The triangle is isosceles (45- 45- 90) , then 2 legs are congruent, soy = x = 15...

Find the surface area of the cylinder use 3.14 for

Ответ:

sierraroeser

14.01.2022

Mathematics

75.36 cm²

Step-by-step explanation:

Data:

r = 2 cm

h = 4 cm

Calculation:

SA = 2πr² + 2πrh

= 2 × 3. 14 × 2² +2 × 3. 14 × 2 × 4

= 6.28 × 2 × 2 + 50.24

= 25.12 + 50.24

= 75.36 cm²

The surface area of the cylinder is 75.36 cm².

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Ответ:

Autumnjackson3186

09.10.2021

Mathematics

x = y = 15 $\sqrt{2}$

Step-by-step explanation:

Using the sine ratio and the exact value

sin45° = $\frac{\sqrt{2} }{2}$ , then

sin45° = $\frac{opposite}{hypotenuse}$ = $\frac{x}{30}$ = $\frac{\sqrt{2} }{2}$ ( cross- multiply )

2x = 30 $\sqrt{2}$ ( divide both sides by 2 )

x = 15 $\sqrt{2}$

The triangle is isosceles (45- 45- 90) , then 2 legs are congruent, so

y = x = 15 $\sqrt{2}$

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Find the surface area of the cylinder use 3.14 for pi

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