The second term of an arithmetic sequence is 7, the sum of the first four terms in the arithmetic sequence is 12, find the first
term and the common difference
1 answer:
Consider the following short explanation.
Answer: a1=15; d= -8.
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(a) a = 10.9 cm
(b) b = 20.78 cm
(c) c = 4.06 cm
<u>Explanation:</u>
(a)
height, h = 5cm
Hypotenuse, H = 12cm
Base, a = ?
Using pythagoras theorm:
(H)² = (h)² + (a)²
(12)² = (5)² + (a)²
119 = a²
a = 10.9 cm
(b)
Hypotenuse, H = 24 cm
Base, a = 12 cm
Height, b = ?
Using pythagoras theorm:
(H)² = (b)² + (a)²
(24)² = (b)² + (12)²
432 = b²
b = 20.78 cm
(c)
height, h = 4 cm
Hypotenuse, H = 5.7 cm
Base, c = ?
Using pythagoras theorm:
(H)² = (h)² + (c)²
(5.7)² = (4)² + (c)²
16.49 = c²
c = 4.06 cm
Answer:
Step-by-step explanation:
The formula for arc length in terms of degrees is
and we have everything we need to fill in to find the angle measure.
which is the same as
and
and
so
θ = 253°
Answer is 7.6...... hope this helps
When you join all the vertices, you can get 35 quadrilaterals.
