Answer:
m∠1 is calculated as 49°.
Step-by-step explanation:
Consider the angles are the interior angles of a triangle.
m∠A =91°
m∠B = 40°
m∠1 = ?
We know that the sum of interior angles of a triangle is 180°. So,
m∠A + m∠B + m∠1 = 180°
or, m∠1 = 180°- m∠A - m∠B
or, m∠1 = 180°- 91° - 40°
or, m∠1 = 49°
Hence, m∠1 = 49°.
Is the same as the one you just did.
keep in mind that, going against the current, the current's speed erodes speed from your regular speed, whilst if you're going with the current, the current's speed adds to it.
now, in this case, you row 5mph, going upstream you're only doing 3mph, whatever happened to the other 2mph? well, the current speed eroded them, meaning the speed of the river is 2mph.
now, going downstream with the current, your regular speed is 5mph, and the current is 2mph, since the current adds to yours, then you're going 5 + 2, mph.
Answer: 47
Step-by-step explanation:
Answer:
Step-by-step explanation:
we know that
The perimeter of the figure is equal to the perimeter of semicircle plus the perimeter of quarter circle plus two times the length of 
plus two times the length of 
<u>Find the perimeter of semicircle</u>
we know that
The circumference of a semicircle is equal to
we have
substitute
<u>Find the perimeter of a quarter of circle</u>
we know that
The circumference of a quarter of circle is equal to
we have
substitute
<u>Find the perimeter of the figure</u>
