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3 years ago

Given the triangle below, what is m < B, rounded to the nearest tenth

Mathematics

2 answers:

aalyn [17]3 years ago

4 0

Answer:

Therefore m∠ B is 42.1°

Step-by-step explanation:

Given:

In Δ ABC

AB = 15 = c

AC = 18 = b

∠ C = 34°

To Find:

∠ B = ?

Solution:

In Δ ABC We have Sine Rule as

$\frac{a}{\sin A}= \frac{b}{\sin B}= \frac{c}{\sin C}$

Substituting the given values we get

$\frac{b}{\sin B}= \frac{c}{\sin C}$

$\frac{18}{\sin B}= \frac{15}{\sin 34}\\\\\sin B=0.671\\\\\therefore B=\sin^{-1}(0.671)=42.14\°$

Therefore m∠ B is 42.1°

solmaris [256]3 years ago

4 0

Answer:42.1

Step-by-step explanation:

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I need help please

bija089 [108]

Hey There!

Lets Just Work through your answers,

ⓧ A - An isosceles triangle is a triangle with (at least) two equal sides, so this would not apply to the given triangle.

:) B - A scalene triangle is a triangle in which all three sides have different lengths so this applies to the given triangle. One side measures 10, one measures 11, and one measures 12.1

ⓧ C - A right triangle is a type of triangle that has one angle that measures 90 degrees, which this triangle does not so this does not apply.

ⓧ D - In geometry, an equilateral triangle is a triangle in which all three sides are equal, so this does not apply to the given triangle.

ⓧ E - An obtuse triangle is a triangle with one obtuse angle (greater than 90°) and two acute angles, so this does not apply to the given triangle.

:) F - An acute triangle (or acute-angled triangle) is a triangle with three acute angles less than 90 degrees. So this applies to the given triangle.

In Summary, B & F classify the given triangle correctly.

If you could rate five starts & give brainliest that would be greatly appreciated!

Hope I helped, Have a good day.

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3 years ago

What’s the fraction fro 5/12+(-7/12)

Veseljchak [2.6K]

Answer:

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Step-by-step explanation:

5/12+(-7/12)

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12 × 12

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Step-by-step explanation:

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Read 2 more answers

A lab technician made a 14 cm diameter hole through the middle of a cylinder that has a diameter of 20 cm and a height of 28 cm.

Step2247 [10]

Answer:

The volume of the finished cylinder is $4486.2 m^3$

Step-by-step explanation:

To find the volume of the finished cylinder, we have to first find the volume of the hole (with 14 cm diameter and a height of 28 cm) and subtract it from the volume of the original cylinder (with diameter of 20 cm and a height of 28 cm).

Note: The hole is also cylindrical in shape.

The volume of a cylinder is given as:

$V = \pi r^2h$