Veto q&a 7 Month22 (1)

@hang out
2018
July
3
3
3a
= 9 3
2
9 3×
2
a = = 18 cm
3
a 18 2/
× 3×
3
= = =
2 3 2 3 2 / 3
3/
× 3×
3
= = 3 3 cm
3/
a 24 12
= = =
2 3 2 3 3
4× 3 4× 3×
3
= =
3 3
= 4 3 cm
2
13 + 14 + 15
S = = 42 / 2 = 21
2
( − )( − )( − )
A = 21 21 13 21 14 21 15
= 21× 8× 7 × 6
= 3× 7× 2× 2× 2× 7× 2×
3
a+ b+ c 15 + 16 + 17
= = = 24
2 2
= 24(24 −15)(24 −16)(24 −17)
= 24× 9× 8×
7
= 3× 2× 2× 2× 3× 3× 2× 2× 2×
7
= 3x2x2x2x 3×
7
= 24 21 cm
2
a 42 14 × 3
= = =
2 3 2 3 2 3
14 × 3 × 3
= = 7 3 cm
2 3
= πr
2
Altitude
Base
Hypotenuse
22
= × 7 3 × 7 3
7
1
× Base × Altitude
2
Q&A Bonus
a
b
a+ b+
c
2
S S a S b S c
c
2 2
h = 17 − 8 = 289 −64
= 225 = 15cm
1
2
1
× 8 × 15
2
v
( − )( S( S−−)( a)( S−−b)
)( S −c)
HSnªm Im ho ≠pw hfcp Pohn - R≠
17
h=?
55