题目内容
如图,在△ABC中,AE是中线,AD是角平分线,AF是高,BE=2,AF=3,填空:
(1)BE=______=
______.
(2)∠BAD=______=
______.
(3)∠AFB=______=______.
(4)S△AEC=______.
(1)BE=______=
1 |
2 |
(2)∠BAD=______=
1 |
2 |
(3)∠AFB=______=______.
(4)S△AEC=______.
(1)∵AE是中线,
∴BE=CE=
BC.
故答案为:CE,BC;
(2)∵AD是角平分线,
∴∠BAD=∠DAC=
∠BAC.
故答案为:∠DAC,∠BAC;
(3)∵AF是高,
∴∠AFB=∠AFC=90°.
故答案为:∠AFC,90°;
(4)∵AE是中线,AF是高,BE=2,AF=3,
∴BE=CE=2,
∴S△AEC=
CE•AF=
×2×3=3.
故答案为:3.
∴BE=CE=
1 |
2 |
故答案为:CE,BC;
(2)∵AD是角平分线,
∴∠BAD=∠DAC=
1 |
2 |
故答案为:∠DAC,∠BAC;
(3)∵AF是高,
∴∠AFB=∠AFC=90°.
故答案为:∠AFC,90°;
(4)∵AE是中线,AF是高,BE=2,AF=3,
∴BE=CE=2,
∴S△AEC=
1 |
2 |
1 |
2 |
故答案为:3.
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