Is side lengths 22, 42, 60 a right triangle? Yes or no?

The cosine rule will be used to identify the angles.

let c = 60, a = 42,and b = 22

a²=b²+c²-2bc.cosA

42²=22²+60²-(2*22*60.cosA)

1764=4084 - 2640.cosA

2640.cosA = 4084 - 1764

cos A = 0.8787

A = 28.5°

b²=a²+c²-2ac.cosB

22²=42²+60²-(2*42*60.cosB)

484=5364-5040.cosB

5040.cosB=5364-484

cosB = 0.9682

B = 14.5°

c²=a²+b²-2ab.cosC

60²=42²+22²-(2*42*22.cosC)

3600=2248 - 1848.cosC

1848.cosC=2248-3600

cosC=-0.7316

C = 137°

From the angles obtained, it shows no angle in the triangle was right-angled, that is, 90°. This triangle wasn't right-angled triangle.

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.

answer: the sun

explanation:

water cycle describes the evaporation of water from earth's surface, formation of clouds and precipitation water back onto the surface of earth. seventy percent of the earth is covered with water in the form of seas and oceans. the heat of the sun causes the evaporation of water from the surface of the ocean. the water vapors rise and condense to form water droplets. the collection of these water droplets form clouds which rain down again.

the evaporation of the oceans surface water as part of the water cycle is caused by the sun