Answer:
100 degrees
Step-by-step explanation:
You can get the measure of b by knowing that a straight line is 180 degrees. So the interior angle formed at R is 40 degrees. That makes the angle at p 40 degrees. The interior sum of a triangle is 180 degrees.
So 40+40+angle at a = 180
angle at a = 180-80 = 100 degrees.
Answer:
4/5
Step-by-step explanation:
<u>Given </u><u>:</u><u>-</u><u> </u>
- A right angled triangle with sides as 3 , 4 and 5 cm .
We need to find the value of sin(β) in the given triangle . We know that the ratio of sine is ,
sin(β) = p/h
- Where p is perpendicular and h is hypontenuse.
sin(β) = 4/5
<h3>Hence the required answer is 4/5.</h3>
Answer:
<CBE and <BED are co-interior Angles. Let <BEC
= X 60+(×40)=180
× =80
If the two diagonals are
and
, the are of the rhombus is
![A=\dfrac{dD}{2}](https://tex.z-dn.net/?f=A%3D%5Cdfrac%7BdD%7D%7B2%7D)
So, in your case, the area is
![A=\dfrac{15\cdot 35}{2}=262.5](https://tex.z-dn.net/?f=A%3D%5Cdfrac%7B15%5Ccdot%2035%7D%7B2%7D%3D262.5)
The other options are wrong because:
- option A doens't divide by 2, thus getting twice the area of the rhombus
- option B summed the diagonals instead of multiplying them
- option D took the difference of the diagonals.