Theorem of cosine:
a²=b²+c²-2bc(cos α) ⇒cos α=-(a²-b²-c²) / 2bc
In this case:
a=15 cm
b=10 cm
c=5 cm
cos α=-(15²-10²-5²) / 2*10*5
cos α=-100 / 100
cos α=-1
A=arc cos -1=180º This is impossible, because:
A+B+C=180º; then B=C=0º This is impossible for make a triangle (B>0 and C>0 if we want to make a triangle).
Therefore: it is not possible can make a triangle with side lengths of 5 cm, 10 cm and 15 cm.
No less than or greater than signs are used, so C and D are out
In this case the equation starts as .45M + 3.50
The only matching statement is A
Answer:
-15
Step-by-step explanation:
5 and 28 if wrong let me know
Answer:
113°
Step-by-step explanation:
Supplementary angles, when combined, must equal 180°. One measurement is given to you, or 67°. Subtract 67 from 180:
180 - 67 = 113
113° is the supplementary angle.
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