Answer:
1. a
2. b
3. c
4. d
Step-by-step explanation:
Answer:
s = 130 degrees
Step-by-step explanation:
decagon has a 1,440 degrees interior angles
equation: 1,440 = s + 1310
to find s, add all the known angles
⇒ s + 150 + 170 + 160 + 130 +120 + 160 + 105 + 160 +155
⇒ s + 1,310
equation:
s + 1310 = 1440
subtract each side by 1310
⇒ s + 1310 - 1310 = 1440 - 1310
⇒ s = 130
Answer
the first one is 2/3 and the second is 1/4 the other i'll comment a little later
Step-by-step explanation:
Answer:
okay
Step-by-step explanation:
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It should be 100 because it has to add up to 180 and 50+30=80 so the third angle must be 100
