They must have the same variable with the same exponent. The coefficient doesn't matter much.
Answer:
0.64 kilometres
Step-by-step explanation:
<u>Step 1: Find the perimeter in metres</u>
Perimeter of square = 4 x (Length)
Perimeter = 4 (160)
Perimeter = 640 metres
<u>Step 2: Convert from metre to kilometre</u>
1 km = 1000 m
x km = 640 m
<em>Cross multiply</em>
1000x = 640
x = 0.64 kilometres
Therefore, the perimeter of the square base is 0.64 kilometres.
!!
Answer:
∠ RQS = 58°, ∠ SRT = 44°
Step-by-step explanation:
The angle at the centre of a circle is equal to the measure of the arc that subtends it, then
angle at centre = arc QR = 76°
∠ RQS = 180° - (76 + 46)° ← sum of angles in a triangle
∠ RQS = 180° - 122° = 58°
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∠ SRQ = 90° ( angle in a semicircle )
∠ SRT = 90° - ∠ QRT = 90° - 46° = 44°