Terlampir di gambar_.
- Tinggi trapesium
[tex] \tt = \sqrt{ {20}^{2} - {((31 - 7) \div 2)}^{2} } [/tex]
[tex] \tt = \sqrt{400 - {(24 \div 2)}^{2} } [/tex]
[tex] \tt = \sqrt{400 - {12}^{2} } [/tex]
[tex] \tt = \sqrt{400 - 144} [/tex]
[tex] \tt = \sqrt{256} [/tex]
= 16 cm
- Luas
[tex] \tt = \frac{(a \: + \: b) \: \times \: t}{2} [/tex]
[tex] \tt = \frac{(31 \: + \: 7) \times 16}{2} [/tex]
[tex] \tt = \frac{38 \: \times \: 16}{2} [/tex]
[tex] \tt = \frac{608 \: {cm}^{2} }{2} [/tex]
= 304 cm²
[tex]\purple{\boxed{\blue{\boxed{\green{\star{\orange{\ \: \: \mathcal{JK} \: \: \: {\green{\star}}}}}}}}} [/tex]
Penjelasan dengan langkah-langkah:
tinggi trapesium..
= √(20² - ([31-7]/2)²)
= √(400 - (24/2)²)
= √(400 - 12²)
= √(400 - 144)
= √256
= 16 cm
Luas = (7 + 31)/2 x 16
= 38/2 x 16
= 19 x 16
= 304 cm²
[answer.2.content]
