hinacat87
13.01.2020 •
Mathematics
In a triangle, the measure of the first angle is twice the measure of the second angle. the measure of the third angle is 8° less that the measure of the second angle. what is the measure of each angle? solve using the fact that the sum of the measures of the three angles of a triangle is 180°. show and check your work.
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Ответ:
the measure of the first angle is 94 degrees
the measure of the second angle is 47 degrees
Let z represent the measure of the third angle is 39 degrees
Step-by-step explanation:
Let x represent the measure of the first angle.
Let y represent the measure of the second angle.
Let z represent the measure of the third angle.
The measure of the first angle is twice the measure of the second angle. This means that
x = 2y
The measure of the third angle is 8° less that the measure of the second angle. This means that
z = y - 8
that the sum of the measures of the three angles of a triangle is 180°. This means that
x + y + z = 180 - - - - - - - - -1
Substituting x = 2y and z = y - 8 into equation 1, it becomes
2y + y + y - 8 = 180
4y = 180 + 8 = 188
y = 188/4 = 47
x = 2y = 2 × 47 = 94 degrees
z = y - 8 = 47 - 8 = 39 degrees.
Ответ:
i hope it helps.And try to understand by yourself.By seeing this picture