Answer:
Number 4: Using Pythagoras Theorem,
![\sqrt{30^2+40^2} =50](https://tex.z-dn.net/?f=%5Csqrt%7B30%5E2%2B40%5E2%7D%20%3D50)
Number 5:
![\sqrt{41^2-40^2}=9](https://tex.z-dn.net/?f=%5Csqrt%7B41%5E2-40%5E2%7D%3D9)
3:
It is a right triangle
4:
Not a right triangle
For the last one:
![\sqrt{(\sqrt{20^2+6^2})^2+6^2} =2\sqrt{118}](https://tex.z-dn.net/?f=%5Csqrt%7B%28%5Csqrt%7B20%5E2%2B6%5E2%7D%29%5E2%2B6%5E2%7D%20%3D2%5Csqrt%7B118%7D)
Rounded down (because the answer needs to be a whole number) is 21
Here is the working:
17x5+5x11
=140
Therefore the answer is (D) 140 square units.
I hope this is helpful
Answer:
144*
Step-by-step explanation:
decagon has 10 sides every side is 144* angles
Answer: <RPS = 161
Step-by-step explanation:
P is the common vertex in all of these angles. From this we know that these have to be adjacent angles (<QPR and <QPS) that equal the whole angle (<RPS)
<QPR+<QPS= <RPS
71+90= 161
(<QPS is a right angle. Right angles are equal to 90 degrees.)
Answer:
a. 90
b. 360
Step-by-step explanation:
The time taken by humming bird to flap its wings= 0.08 sec
by flying 7.2 seconds a typical giant hummingbird flap its wings
times
= 90 times
Since, A ruby-throated hummingbird can flap its wings 4 times faster than a giant hummingbird, it will flap its wings in every 0.02 sec
so in 7.2 seconds it will flap
times = 360 times