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Mathematics
Mathematics
Problem
Which one of the following sets contains only acute angles? a)
{
0
∘
,
60
∘
,
88
∘
}
\{0^{\circ},\ 60^{\circ},\ 88^{\circ}\}
{
0
∘
,
6
0
∘
,
8
8
∘
}
b)
{
30
∘
,
90
∘
,
85
∘
}
\{30^{\circ},\ 90^{\circ},\ 85^{\circ}\}
{
3
0
∘
,
9
0
∘
,
8
5
∘
}
c)
{
10
∘
,
45
∘
,
80
∘
}
\{10^{\circ},\ 45^{\circ},\ 80^{\circ}\}
{
1
0
∘
,
4
5
∘
,
8
0
∘
}
d)
{
22
∘
,
89
∘
,
97
∘
}
\{22^{\circ},\ 89^{\circ},\ 97^{\circ}\}
{
2
2
∘
,
8
9
∘
,
9
7
∘
}
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