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2 years ago

Geomtry plz help me 15 pointz

Mathematics

2 answers:

Lilit [14]2 years ago

8 0

Answer:

m∠R=76º

Step-by-step explanation:

All angles in a triangle add up to 180º.

The triangle given is an isosceles triangle.

(2x+2)+(3x+1)+(2x+2)=180

Remove parentheses.

2x+2+3x+1+2x+2=180

Collect like terms.

7x+2+1+2=180

Add.

7x+5=180

Subtract 5 from both sides of the equation.

7x=175

Divide 7 from both sides of the equation.

x=25

m∠R=(3x+1)º

3x25+1=76º

m∠R=76º

Hope this helps :)

nikitadnepr [17]2 years ago

7 0

Answer:

m∠R=76°

Step-by-step explanation:

∠STR=∠RST=(2x+2)° (base angles of isos triangle)

2(2x+2)+(3x+1)=180 (angle sum of triangle)

4x+4+3x+1=180

7x+5=180

7x=180-5

=175

x=175÷7

=25

Hence, m∠R = (3x+1)°

= [3(25)+1]°

= (75+1)°

= 76°

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