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4 years ago

Triangles PIC Included

Mathematics

2 answers:

ZanzabumX [31]4 years ago

6 0

Answer:

sin70° = x/6

Step-by-step explanation:

When we draw out our picture and triangle, we should see that our angle is on the ground 70°, the height <em>x</em> is across from the angle and is the vertical leg up, and that our hypotenuse is equal to 6:

sin70° = x/6

Delvig [45]4 years ago

6 0

I believe the answer is C

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At breakfast, he drinks 237 milliliters. At lunch, he drinks 300 milliliters.

Lostsunrise [7]

Answer:

$Total\ amount\ of\ water\approx720\ ml$ (Estimation)
$Actual\ amount\ of\ water=714\ ml$

Step-by-step explanation:

<h3> The complete exercise is:</h3><h3> "At breakfast, he drinks 237 milliliters. At lunch, he drinks 300 milliliters. At dinner, he drinks 177 milliliters. Estimate the total amount of water Rogelio drinks. Then, find the actual amount of water he drinks at all three meals."</h3>

In order to estimate the total amount of water Rogelio drinks at all three meals, you need to follow these steps:

1. Round 237 milliliters and 177 milliliters to the nearest Tens place.

If the digit in the Ones place is less than 5, you must round down.

If the digit in the Ones place is greater than or equal to 5, you must round up.

Then:

$237\ ml\approx240\ ml\\\\177\ ml\approx180\ ml$

2. Add 240 milliliters, 300 milliliters and 180 milliliters:

$Total\ amount\ of\ water\approx240\ ml+300\ ml+180\ ml\approx720\ ml$

In order to find the actual amount of water Rogelio drinks at all three meals, just add 237 milliliters, 300 milliliters and 177 milliliters. This is:

$Actual\ amount\ of\ water=237\ ml+300\ ml+177\ ml=714\ ml$

5 0

3 years ago

Find the height of the triangle

Marianna [84]

Answer:

The height is 12 cm

Step-by-step explanation:

Hi there!

We are given a triangle with the 3 sides marked as 15, 20, and 25 and we want to find the height of it (marked as x in the problem).

This problem can seem a bit difficult, but let's see if the triangle is a right triangle first off.

One way to figure out if it is a right triangle is to apply the converse of the Pythagorean theorem.

Let's label the sides, where a is the shortest side, b is the second shortest side, and c is the longest side:

a=15

b=20

c=25

Now square a and b, then add the result together. If it's the same as c squared, then the triangle is a right triangle

15²+20²=25²

225+400=625

625=625

So we can safely say that the triangle is a right triangle

This makes the problem way easier, as there are 2 ways to find the area of a right triangle:

The first way is to multiply the legs (the sides that make up the right angle) together, then divide the result by 2

The other way is to multiply the height and the hypotenuse (the side OPPOSITE to the right angle) together, and then divide the result by 2

First, we need to figure out which sides are the legs, and which side is the hypotenuse

By the triangle inequality theorem, the hypotenuse of a right triangle is the longest side, which means that the 25 cm side is the hypotenuse, and that leaves 15 cm and the 20 cm sides as the legs

So let's find the area of the triangle using the legs

A= $\frac{15*20}{2}$ = $\frac{300}{2}$ =150

So the area of the triangle is 150 cm²

However, as mentioned above, we can also find the area of the triangle by multiplying the hypotenuse by the base, then dividing the result by 2

Which means that the area is also:

A= $\frac{25x}{2}$ cm²

As these both equal the area of the triangle, we can set them equal to each other. This is possible via a property known as transitivity (if a=b and b=c, then a=c)

$\frac{25x}{2}=150$