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motikmotik
3 years ago
8

I need help with 6 and 10

Mathematics
2 answers:
Tanya [424]3 years ago
8 0

Hey there!

Things to remember:

  • <em>The total angle in a triangle is 180°</em>
  • <em>The base angles in an isosceles triangle are equal. </em>

_______________________________________________

(6) One of the base angle is (9x-25)

Hence, the angles are:

(9x-25) , (9x-25) and 104

Their sum is 180.

Hence,

... 9x-25+9x-25+104=180

... 18x-50+104=180

... 18x+54=180

... 18x=180-54

... 18x=126

... x=126/18

... x=7

<em>Hence, the value of the variable is '7'. </em>

_______________________________________________

(10) In this triangle, the base angle is 20, vertex angle is 11x-65

Hence,

The angles are (11x-65),29 and 29

Their sum is 180°

Hence,

...11x-65+29+29=180

...11x-65+58=180

...11x-7=180

...11x=180+7

...11x=187

...x=187/11

...x=17

<em>Hence, the value of the variable is 17. </em>

______________________________________________

Hope my answer helps!

Archy [21]3 years ago
7 0
Do both as equation it will make it easier for her
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