jajar genjang luasnya 98cm ,tingginya 1/2 dari alasnya

[tex] L ~ = a \times t \\ 98 = a \times \dfrac{1}{2} a \\ 98 = \dfrac{1}{2} a^{2} \\ 98 \div \dfrac{1}{2} = a^{2} \\ a^{2} = 196 \\ a = \sqrt{196} \\ a = 14 ~ cm \\ \\ \\ t = \dfrac{1}{2} \times 14 \\ t ~= 7~cm [/tex]

luas jajaran genjang
L = alas x tinggi
L = a x 1/2 a
98 = 1/2 a^2
196 = a^2
a = 14 cm
t = 7 cm