[tex]\\ \sf\Rrightarrow \dfrac{15}{20}=\dfrac{21}{28}[/tex]
[tex]\\ \sf\Rrightarrow \dfrac{1}{4}=\dfrac{1}{4}[/tex]
Hence they are similar
#2
- <A=<H
- And ratio of sides are same
Hence both triangles are similar by SAS property
#3
[tex]\\ \sf\Rrightarrow ∆KDH\sim ∆ABD[/tex]
