1 files changed, 8 insertions, 0 deletions
diff --git a/src/model/size.ts b/src/model/size.ts
new file mode 100644
index 0000000..5e8a778
--- /dev/null
+++ b/src/model/size.ts
@@ -0,0 +1,8 @@
+export interface Size {
+  width: number,
+  height: number,
+}
+
+export function diagonal(size: Size): number {
+  return Math.sqrt(size.width ** 2 + size.height ** 2)
+}