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emmalou14
31.03.2020 •
Mathematics
Find the surface area of the cylinder, round to the nearest tenth if needed.
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Ответ:
70
Step-by-step explanation:
2π squared + 2π × Radius(4) × height (2)
= 70.00469126
Ответ:
∠URV = 23°
Step-by-step explanation:
Given that:
RSTU is a parallelogram. If m∠TSV = 31° and m∠SVT = 126°
The objective is to explain how you can find the measure of ∠URV.
The diagrammatic expression of the parallelogram can be seen in the attached file below.
From the diagram , if we take a look at ΔSVT;
∠TSV + ∠SVT + ∠VTS = 180° ( sum of angles in a triangle = 180° )
31° + 126° + ∠VTS = 180°
157° + ∠VTS = 180°
∠VTS = 180° - 157°
∠VTS = 23°
For a parallelogram, the opposite sides are parallel to each other. From the diagram below , we can say that ST || RU ( parallel lines are equal)
Also, the alternate angles between two parallel lines formed by a transverse line are equal.
From the RSTU parallelogram seen below, ∠VTS and ∠URV are alternate angles between the parallel lines ST and RU which is formed by the transversal RT.
Hence;
∠URV = ∠VTS ( alternate angles)
∠URV = 23°