All categories

3 years ago

The perimeter of a triangle is 63m. Two of the sides are 20cm and 27cm. What is the length of the third side.

Mathematics

1 answer:

Blizzard [7]3 years ago

5 0

Answer:

16cm

Step-by-step explanation:

63 = 20 + 27 + x

You might be interested in

Help meeee it's math ::Simplify an expression for the perimeter of the rectangle shown

bagirrra123 [75]

8.6x + 3 + 8.6+3 =. 17.2x + 6

5.2+5.2= 10.4

17.2x + 6 = 10.4

5 0

3 years ago

Please help will give correct answer brainliest

kodGreya [7K]

Answer:

Step-by-step explanation:

Let us begin with the AA Similarity definition. It states that if two angles of one triangle are congruent to two angles of another triangle, then the triangles are similar.

This means that we need:

An angle of one triangle that is congruent to an angle of the other triangle.
Another angle of one triangle that is congruent to another angle of the other triangle.

For this problem, it is unclear that there are more than one angles that are congruent to each other. We see that angle <DEF and <ABC are congruent, but the problem does not give any other angles. In another case, we must find one more to prove similarity by the AA similarity theorem.

6 0

4 years ago

At the beginning of the school year, Rochelle joins the school garden club. In her plot of land, she plants 4 rows of tulips, ea

igor_vitrenko [27]

4 rows times 27 bulbs = 108

6 0

3 years ago

Read 2 more answers

Find the measures of the three angles, in radians, of the triangle with the given vertices: d(1,1,1), e(1,−5,2), and f(−2,2,7).

Oduvanchick [21]

Consider triangle DEF with vertices D(1,1,1), E(1,-5,2) and F(-2,2,7).

1. Find

$\overrightarrow{DE}=(1-1,-5-1,2-1)=(0,-6,1),\\ \\\overrightarrow{DF}=(-2-1,2-1,7-1)=(-3,1,6).$

Then

$\cos \angle D=\dfrac{0\cdot (-3)+(-6)\cdot 1+1\cdot 6}{\sqrt{0^2+(-6)^2+1^2}\cdot \sqrt{(-3)^2+1^2+6^2}}=\dfrac{0}{\sqrt{37} \cdot \sqrt{46} }=0.$

2. Find

$\overrightarrow{ED}=(1-1,1-(-5),1-2)=(0,6,-1),\\ \\\overrightarrow{EF}=(-2-1,2-(-5),7-2)=(-3,7,5).$

Then

$\cos \angle E=\dfrac{0\cdot (-2)+6\cdot 7+(-1)\cdot 5}{\sqrt{0^2+6^2+(-1)^2}\cdot \sqrt{(-3)^2+7^2+5^2}}=\dfrac{37}{\sqrt{37} \cdot \sqrt{83} }=\sqrt{\dfrac{37}{83}}.$

3. Find

$\overrightarrow{FE}=(1-(-2),-5-2,2-7)=(3,-7,-5),\\ \\\overrightarrow{FD}=(1-(-2),1-2,1-7)=(3,-1,-6).$

Then

$\cos \angle F=\dfrac{3\cdot 3+(-7)\cdot (-1)+(-5)\cdot (-6)}{\sqrt{3^2+(-7)^2+(-5)^2}\cdot \sqrt{3^2+(-1)^2+(-6)^2}}=\dfrac{46}{\sqrt{83} \cdot \sqrt{46} }=\sqrt{\dfrac{46}{83}}.$

$\angle E=\arccos0=\dfrac{\pi}{2},\\ \\
\angle D=\arccos\letf(\sqrt{\dfrac{37}{83}}\right)\approx 0.27\pi,\\ \\
\angle F=\arccos\letf(\sqrt{\dfrac{46}{83}}\right)\approx 0.23\pi.$

3 0

3 years ago

In a flock of black and white sheep. 2 out of five sheep are white. ifnthere are eiht more black sheep than white sheep, how man

kozerog [31]

Can you retype this please? then i can help

3 0

3 years ago

The perimeter of a triangle is 63m. Two of the sides are 20cm and 27cm. What is the length of the third side.​

The perimeter of a triangle is 63m. Two of the sides are 20cm and 27cm. What is the length of the third side.