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1、資源班數(shù)學(xué)教學(xué)者:蕭秀蓓放大與縮小01【放大倍數(shù)】右圖中,長(zhǎng)方形ABCD是長(zhǎng)方形AEFG的幾倍放大圖?()÷()=右圖中,長(zhǎng)方形ABCD是長(zhǎng)方形AEFG的幾倍放大圖?()÷()=右圖中,長(zhǎng)方形ABCD是長(zhǎng)方形AEFG的幾倍放大圖?右圖中,長(zhǎng)方形ABCD是長(zhǎng)方形AEFG的幾倍放大圖?右圖中,長(zhǎng)方形ABCD是長(zhǎng)方形AEFG的幾倍放大圖?右圖中,長(zhǎng)方形ABCD是長(zhǎng)方形AEFG的幾倍放大圖?資源班數(shù)學(xué)教學(xué)者:蕭秀蓓右圖中,長(zhǎng)方形ABCD的面積是長(zhǎng)方形AEFG的面積的幾倍放大圖?()÷()=【】【】×【】=右圖中,長(zhǎng)方形ABCD的面積是長(zhǎng)方形AEFG的面積的幾倍放大圖?()÷()
2、=【】【】×【】=右圖中,長(zhǎng)方形ABCD的面積是長(zhǎng)方形AEFG的面積的幾倍放大圖?右圖中,長(zhǎng)方形ABCD的面積是長(zhǎng)方形AEFG的面積的幾倍放大圖?右圖中,長(zhǎng)方形ABCD的面積是長(zhǎng)方形AEFG的面積的幾倍放大圖?資源班數(shù)學(xué)教學(xué)者:蕭秀蓓放大與縮小02【對(duì)應(yīng)邊與對(duì)應(yīng)角】請(qǐng)找出對(duì)應(yīng)邊與對(duì)應(yīng)角四邊形ABCD與四邊形EFGH中:AB的對(duì)應(yīng)邊是CD的對(duì)應(yīng)邊是∠A的對(duì)應(yīng)角是∠B的對(duì)應(yīng)角是∠C的對(duì)應(yīng)角是∠D的對(duì)應(yīng)角是四邊形ABCD與四邊形EFGH中:AD的對(duì)應(yīng)邊是BC的對(duì)應(yīng)邊是∠A的對(duì)應(yīng)角是∠B的對(duì)應(yīng)角是∠C的對(duì)應(yīng)角是∠D的對(duì)應(yīng)角是五邊形ABCDE與五邊形FGHPQ中:CD的對(duì)應(yīng)邊是D
3、E的對(duì)應(yīng)邊是∠A的對(duì)應(yīng)角是∠B的對(duì)應(yīng)角是∠E的對(duì)應(yīng)角是六邊形ABCDEF與六邊形MNOPQR中:BC的對(duì)應(yīng)邊是EF的對(duì)應(yīng)邊是∠A的對(duì)應(yīng)角是∠C的對(duì)應(yīng)角是∠F的對(duì)應(yīng)角是四邊形ABCD與四邊形EFGH中:CD的對(duì)應(yīng)邊是AB的對(duì)應(yīng)邊是∠F的對(duì)應(yīng)角是∠G的對(duì)應(yīng)角是∠E的對(duì)應(yīng)角是資源班數(shù)學(xué)教學(xué)者:蕭秀蓓四邊形ABCD與四邊形EFGH中:AD的對(duì)應(yīng)邊是BC的對(duì)應(yīng)邊是∠A的對(duì)應(yīng)角是∠B的對(duì)應(yīng)角是∠C的對(duì)應(yīng)角是∠D的對(duì)應(yīng)角是四邊形ABCD與四邊形EFGH中:AB的對(duì)應(yīng)邊是BC的對(duì)應(yīng)邊是∠E的對(duì)應(yīng)角是∠F的對(duì)應(yīng)角是∠G的對(duì)應(yīng)角是∠H的對(duì)應(yīng)角是四邊形ABCD與四邊形EFGH中:BC的對(duì)應(yīng)邊
4、是AD的對(duì)應(yīng)邊是∠B的對(duì)應(yīng)角是∠C的對(duì)應(yīng)角是∠D的對(duì)應(yīng)角是∠A的對(duì)應(yīng)角是四邊形ABCD與四邊形EFGH中:GH的對(duì)應(yīng)邊是EF的對(duì)應(yīng)邊是∠D的對(duì)應(yīng)角是∠E的對(duì)應(yīng)角是∠H的對(duì)應(yīng)角是∠A的對(duì)應(yīng)角是四邊形ABCD與四邊形EFGH中:FG的對(duì)應(yīng)邊是EH的對(duì)應(yīng)邊是∠F的對(duì)應(yīng)角是∠H的對(duì)應(yīng)角是∠C的對(duì)應(yīng)角是∠A的對(duì)應(yīng)角是資源班數(shù)學(xué)教學(xué)者:蕭秀蓓放大與縮小03【方格紙作圖】請(qǐng)畫(huà)出2倍的放大圖請(qǐng)畫(huà)出2倍的放大圖請(qǐng)畫(huà)出3倍的放大圖請(qǐng)畫(huà)出3倍的放大圖資源班數(shù)學(xué)教學(xué)者:蕭秀蓓請(qǐng)畫(huà)出倍的縮小圖請(qǐng)畫(huà)出倍的縮小圖請(qǐng)畫(huà)出倍的縮小圖資源班數(shù)學(xué)教學(xué)者:蕭秀蓓放大與縮小03-1【方格紙作圖】請(qǐng)畫(huà)出2倍的放大
5、圖請(qǐng)畫(huà)出2倍的放大圖請(qǐng)畫(huà)出3倍的放大圖請(qǐng)畫(huà)出3倍的放大圖資源班數(shù)學(xué)教學(xué)者:蕭秀蓓請(qǐng)畫(huà)出倍的縮小圖請(qǐng)畫(huà)出倍的縮小圖請(qǐng)畫(huà)出倍的縮小圖資源班數(shù)學(xué)教學(xué)者:蕭秀蓓放大與縮小04【對(duì)應(yīng)角相等,對(duì)應(yīng)邊成比例】左圖中△DEF是△ABC的2倍放大圖,已知∠A=80°、∠B=40°、AB=4單位長(zhǎng),則∠D=°、∠E=°DE=()×2=單位長(zhǎng)左圖中△DEF是△ABC的3倍放大圖,已知∠A=60°、∠B=90°、AB=5單位長(zhǎng),則∠D=°、∠E=°、∠F=°DE=()×3=單位長(zhǎng)左圖中四邊形EFGH是四邊形ABCD的1.2倍放大圖,已知∠A=120°、∠B=60°、CD=3單位長(zhǎng),則∠D=°、
6、∠E=°GH=()×1.2=單位長(zhǎng)左圖中四邊形EFGH是四邊形ABCD的1.6倍放大圖,已知∠A=75°、∠B=105°、BC=6單位長(zhǎng),則∠D=°、∠E=°FG=()×1.6=單位長(zhǎng)左圖中五邊形MNOPQ是五邊形ABCDE的2.5倍放大圖,已知∠A=90°、∠B=105°、BC=5單位長(zhǎng),則∠D=°、∠E=°FG=()×2.5=單位長(zhǎng)資源班數(shù)學(xué)教學(xué)者:蕭秀蓓左圖中△DEF是△ABC的倍縮小圖,已知∠A=55°、∠B=85°、AB=4單位長(zhǎng),則∠D=°、∠E=°DE=()×=單位長(zhǎng)左圖中四邊形EFGH是四邊形ABCD的倍縮小圖,已知∠A=50°、∠B=130°、CD=6
7、單位長(zhǎng),則∠D=°、∠E=°GH=()×=單位長(zhǎng)左圖中四邊形EFGH是四邊形ABCD的倍縮小圖,已知∠A=45°、∠B=135°、CD=9單位長(zhǎng),則∠D=°、∠E=°GH=()×=單位長(zhǎng)左圖中五邊形MNOPQ是五邊形ABCDE的倍縮小圖,已知∠B=75°、∠D=90°、AB=12單位長(zhǎng),則∠N=°、∠P=°MN=()×=單位長(zhǎng)左圖中五邊形MNOPQ是五邊形ABCDE的倍縮小圖,已知∠B=65°、∠D=100°、AB=15單位長(zhǎng),則∠N=°、∠P=°MN=()×=單位長(zhǎng)