Answer:
m∠PQR = 133
Step-by-step explanation:
∠PQR and ∠RQS are supplementary angles, meaning they have a sum of 180°.
3x - 5 + x + 1 = 180
4x - 4 = 180
4x = 184
x = 46
Now we simply substitute 46 in for x:
3(46) - 5 = 133
Answer:
it's the 3rd one
Step-by-step explanation:
i used m ath way
Answer:

Step-by-step explanation:
Given

<em>See attachment for circle</em>
Required
Find 
From the attachment, we can see that:
is at the circumference
is in at the center
From cyclic theorems,
The relationship between ABC and ADC is:

Make ABC the subject

Substitute: 


Answer: 157 cm²
Step-by-step explanation:
A semicircle whose diameter is 20 cm will have an area of 157 cm²