State if each triangle is acute,obtuse or right 5cm 13 cm 12 cm

Mathematics

2 answers:

AfilCa [17]3 years ago

8 0

Answer:

Scalene triangle

Step-by-step explanation:

Given a triangle with sides 5cm 13cm and 12cm.

The triangle is neither acute nor obtuse nor right angled triangle.

It’s a scalene triangle because none of the given sides are equal.

Acute angle is an angle less than 90 degrees while a right angle triangle is an angle equal to 90 degrees. Obtuse traingle has only two equal sides .

lbvjy [14]3 years ago

4 0

Step-by-step explanation:

The given measurements forms right triangle.

$\because \: {13}^{2} = {5}^{2} + {12}^{2}$

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Charlie is standing 45 feet from the base of 100 foot tall tree. What is the angle of elevation from him to the kite stuck on to

galben [10]

Hey. Let me help you on this one.

In order for us to solve this problem easier, let's break it apart. We can also graph the triangle so we get visual of this problem.

I drew a quick graph for you to easier understand this question. As you can see, Charlie is standing below the tree 45 feet from it, and we need to find the unknown angle measure.

Let's form a SOHCAHTOA function which you have probably already learned in your Geometry course.

First of all let's identify our sides. The side opposite of the right triangle is a Hypotenuse, and the side that's 45 feet is adjacent, since it's adjacent to the unknown angle.

We know that we need to use $Cos$ (Cosine) with negative power to it in order to solve this question, since we are looking for the unknown angle measure.

Let's form the function which $Cos$ , Hypotenuse, and Adjacent side.

$Cos^{-1} =45/100$

Now, let's solve the left part of this function

$
Cos^{-1} =0.45$

Awesome. You will need to use your calculator for this part. Find the value of 0.45 when negative Cosine is used on it.

$Cos^{-1} =0.45$
$63.25631605$

Awesome. Let's round this number to the closest tenth

$63.3$ is the rounded value we have discussed below.

Answer: 63.3 degrees is the unknown measure of the angle