Help !! what is the m<|1
2 answers:
Answer:
Step-by-step explanation:
The 3 interior angles of a triangle must add to 180 degrees.
- m∠1 + m∠2 + m∠3 = 180°
We don't know the measure of angle 1. We can say the measure of angle 2 is 61° and the measure of angle 3 is 51°.
- m∠1 + 61° + 51°= 180°
Add the numbers on the left side.
- m∠1 + 112° = 180°
We want to isolate the measure of angle 1.
112 is being added, so we must perform the inverse operation of subtraction.
- m∠1 +112°-112°= 180°-112°
- m∠1= 180° - 112°
- m∠1=68°
The measure of angle 1 is 68 degrees.
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Answer:
= 10n
Step-by-step explanation:
The nth term of an arithmetic sequence is
= a₁ + (n - 1)d
where a₁ is the first term and d the common difference
Here a₁ = 10 and d = a₂ - a₁ = 20 - 10 = 10 , then
= 10 + 10(n - 1) = 10 + 10n - 10 = 10n