motorxr714
motorxr714 motorxr714
  • 12-12-2019
  • Mathematics
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i need help with these two questions

i need help with these two questions class=

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iashwin2002osxh2c
iashwin2002osxh2c iashwin2002osxh2c
  • 12-12-2019

5. If the sum of all the angles of a triangle is 180°

In an isosceles triangle two of the angles are equal. Let us call one of these angles x

Therefore, 2 x + 120° = 180°

2 x = 60°

x = 60° / 2

x = 30°

Therefore, The measure of the base angle is 30°.

6. The base angles of an isosceles triangle are equal

So, (7 x + 5)° = (x + 47)°

7 x - x = 47 - 5

6 x = 42

x = 7

Therefore, the value of x is 7

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