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vampirchik [111]
4 years ago
11

Which quadrilateral has no right angle

Mathematics
2 answers:
Mariana [72]4 years ago
7 0
The only one with two obtuse and two right angles.

Trapezoid
quester [9]4 years ago
3 0
Squares and rectangles must all have exactly four right angles.

However,  quadrilateral that don't have to have four right angles are trapezoids, parallelograms and rhombi. 

trapezoids - different angles
parallelograms - 2 acute, 2 obtuse angles
rhombi - 2 acute, 2 obtuse angles

Note that a rhombus is a type of parallelogram.

Hope this helps! :)
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Someone help me with my math homework pleaseee. Find the volumes of the pyramids and the height is 7cm for the first one.
gregori [183]
\bf \textit{volume of a pyramid}\\\\
V=\cfrac{1}{3}Bh\qquad 
\begin{cases}
B=\textit{area of the base}\\
h=height
\end{cases}

now, the first one, on the far-left.... can't see the height.. but I gather you do, now as far as its Base area, well, the bottom is just a 12x12 square, so the area of its base is just 12*12


now, the middle pyramid, has a height of 6, the base is also a square, 8x8, so the Base area is just 8*8

now the last one on the far-right

has a height of 8, the Base is a Hexagon, with sides of 6

\bf \textit{area of a regular polygon}\\\\
A=\cfrac{1}{4}ns^2cot\left( \frac{180}{n} \right)\qquad 
\begin{cases}
n=\textit{number of sides}\\
s=\textit{length of one side}\\
\frac{180}{n}=\textit{angle in degrees}\\
----------\\
n=6\\
s=6
\end{cases}\\\\\\ A=\cfrac{1}{4}\cdot 6\cdot 6^2\cdot cot\left( \frac{180}{6} \right)
5 0
3 years ago
If the average (arithmetic mean) of 10,20,30,40, and x is 60, what is the value of x​
Lilit [14]

60 =  (10 + 20 + 30 + 40 + x)/5

300 = 100 + x

x = 200

Answer: 200

8 0
3 years ago
Please can someone help me im going to failed if i don't get help
kupik [55]

Answer:

good

Step-by-step explanation:

5 0
2 years ago
How many days in the month of february??
Rashid [163]
Well it depends if it's a leap year. If it isn't a leap year there are 28 days and if we are in a leap year than there are 29 days in February. Hope that helped :)
7 0
4 years ago
???????????anybody helppp
fredd [130]

Answer:

B) 24 p-35

Step-by-step explanation:

<u>Step :1</u>

<u>A</u>pply distributive property  a.(b+c) = a.b+a.c

Given data 1+4(6 p-9)

                                 = 1+4.6 p - 4.9

multiply

                                 = 1+ 24 p - 36

subtracting

                                 = 24 p - 35

5 0
3 years ago
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