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raizagisselle1273
27.09.2019 •
Mathematics
Orlando is measuring the angles of a triangle. he measures the first two angles and gets 30° and 70°. what should be the measure of the third angle?
a) 50°
b) 80°
c) 100°
d) 260°
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Ответ:
B) Third angle 80°.
Step-by-step explanation:
Given : Orlando is measuring the angles of a triangle. He measures the first two angles and gets 30° and 70°.
To find : What should be the measure of the third angle.
Solution : We have given a triangle
One angle of triangle = 30° .
Second angle of triangle = 70°.
Let the third angle = x .
By the angle sum property : Sum of all the angle of a triangle is 180°.
Then, 30° + 70° + x = 180.
100 ° + x = 180°.
On subtracting both sides by 100
x = 180 - 100.
x = 80 degree.
Therefore, B) Third angle 80°.
Ответ:
There is no side of E in triangle ABC.
Step-by-step explanation:
The name of a triangle is a list of its sides.